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Finding the Fourth Proportional to 66,661,594.80, 91,955,961.72 and 38,781,173.04

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Solution

The fourth proportional to 66,661,594.80, 91,955,961.72 and 38,781,173.04 is: 53,496,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661,594.80 : 91,955,961.72 = 38,781,173.04 : x
  2. Step 2: Convert to fraction form
    66,661,594.80/91,955,961.72 = 38,781,173.04/x
  3. Step 3: Cross multiply
    66,661,594.80x = 91,955,961.72 × 38,781,173.04
  4. Step 4: Simplify right side
    66,661,594.80x = 3,566,160,063,522,936
  5. Step 5: Solve for x
    x = 3,566,160,063,522,936/66,661,594.80
  6. Step 6: Final answer
    x = 53,496,470.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.