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Finding the Fourth Proportional to 66,412.20, 99,666.90 and 44,218.20

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Solution

The fourth proportional to 66,412.20, 99,666.90 and 44,218.20 is: 66,359.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,412.20 : 99,666.90 = 44,218.20 : x
  2. Step 2: Convert to fraction form
    66,412.20/99,666.90 = 44,218.20/x
  3. Step 3: Cross multiply
    66,412.20x = 99,666.90 × 44,218.20
  4. Step 4: Simplify right side
    66,412.20x = 4,407,090,917.58
  5. Step 5: Solve for x
    x = 4,407,090,917.58/66,412.20
  6. Step 6: Final answer
    x = 66,359.66

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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.