Home / 78,761.85-118,068.08-31,406.04

Finding the Fourth Proportional to 78,761.85, 118,068.08 and 31,406.04

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Solution

The fourth proportional to 78,761.85, 118,068.08 and 31,406.04 is: 47,079.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,761.85 : 118,068.08 = 31,406.04 : x
  2. Step 2: Convert to fraction form
    78,761.85/118,068.08 = 31,406.04/x
  3. Step 3: Cross multiply
    78,761.85x = 118,068.08 × 31,406.04
  4. Step 4: Simplify right side
    78,761.85x = 3,708,050,686.17
  5. Step 5: Solve for x
    x = 3,708,050,686.17/78,761.85
  6. Step 6: Final answer
    x = 47,079.27

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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.