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Finding the Fourth Proportional to 66,895,999.20, 100,343,998.80 and 21,462,386.40

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Solution

The fourth proportional to 66,895,999.20, 100,343,998.80 and 21,462,386.40 is: 32,193,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,895,999.20 : 100,343,998.80 = 21,462,386.40 : x
  2. Step 2: Convert to fraction form
    66,895,999.20/100,343,998.80 = 21,462,386.40/x
  3. Step 3: Cross multiply
    66,895,999.20x = 100,343,998.80 × 21,462,386.40
  4. Step 4: Simplify right side
    66,895,999.20x = 2,153,621,675,166,736
  5. Step 5: Solve for x
    x = 2,153,621,675,166,736/66,895,999.20
  6. Step 6: Final answer
    x = 32,193,579.60

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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.