Home / 129,539.01-178,761.14-72,178.10

Finding the Fourth Proportional to 129,539.01, 178,761.14 and 72,178.10

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Solution

The fourth proportional to 129,539.01, 178,761.14 and 72,178.10 is: 99,604.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,539.01 : 178,761.14 = 72,178.10 : x
  2. Step 2: Convert to fraction form
    129,539.01/178,761.14 = 72,178.10/x
  3. Step 3: Cross multiply
    129,539.01x = 178,761.14 × 72,178.10
  4. Step 4: Simplify right side
    129,539.01x = 12,902,639,705.49
  5. Step 5: Solve for x
    x = 12,902,639,705.49/129,539.01
  6. Step 6: Final answer
    x = 99,604.28

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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.