Home / 129,397.26-178,566.39-72,808.50

Finding the Fourth Proportional to 129,397.26, 178,566.39 and 72,808.50

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Solution

The fourth proportional to 129,397.26, 178,566.39 and 72,808.50 is: 100,474.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,397.26 : 178,566.39 = 72,808.50 : x
  2. Step 2: Convert to fraction form
    129,397.26/178,566.39 = 72,808.50/x
  3. Step 3: Cross multiply
    129,397.26x = 178,566.39 × 72,808.50
  4. Step 4: Simplify right side
    129,397.26x = 13,001,151,006.32
  5. Step 5: Solve for x
    x = 13,001,151,006.32/129,397.26
  6. Step 6: Final answer
    x = 100,474.70

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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.