Home / 78,881,045.10-118,321,567.65-66,787,809.90

Finding the Fourth Proportional to 78,881,045.10, 118,321,567.65 and 66,787,809.90

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Solution

The fourth proportional to 78,881,045.10, 118,321,567.65 and 66,787,809.90 is: 100,181,714.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,881,045.10 : 118,321,567.65 = 66,787,809.90 : x
  2. Step 2: Convert to fraction form
    78,881,045.10/118,321,567.65 = 66,787,809.90/x
  3. Step 3: Cross multiply
    78,881,045.10x = 118,321,567.65 × 66,787,809.90
  4. Step 4: Simplify right side
    78,881,045.10x = 7,902,438,367,278,190
  5. Step 5: Solve for x
    x = 7,902,438,367,278,190/78,881,045.10
  6. Step 6: Final answer
    x = 100,181,714.85

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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.