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Finding the Fourth Proportional to 66,475,998.80, 99,713,998.20 and 21,041,349.20

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Solution

The fourth proportional to 66,475,998.80, 99,713,998.20 and 21,041,349.20 is: 31,562,023.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,475,998.80 : 99,713,998.20 = 21,041,349.20 : x
  2. Step 2: Convert to fraction form
    66,475,998.80/99,713,998.20 = 21,041,349.20/x
  3. Step 3: Cross multiply
    66,475,998.80x = 99,713,998.20 × 21,041,349.20
  4. Step 4: Simplify right side
    66,475,998.80x = 2,098,117,056,254,371.50
  5. Step 5: Solve for x
    x = 2,098,117,056,254,371.50/66,475,998.80
  6. Step 6: Final answer
    x = 31,562,023.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.