Home / 129,325.17-178,468.69-72,736.50

Finding the Fourth Proportional to 129,325.17, 178,468.69 and 72,736.50

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Solution

The fourth proportional to 129,325.17, 178,468.69 and 72,736.50 is: 100,376.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,325.17 : 178,468.69 = 72,736.50 : x
  2. Step 2: Convert to fraction form
    129,325.17/178,468.69 = 72,736.50/x
  3. Step 3: Cross multiply
    129,325.17x = 178,468.69 × 72,736.50
  4. Step 4: Simplify right side
    129,325.17x = 12,981,187,870.19
  5. Step 5: Solve for x
    x = 12,981,187,870.19/129,325.17
  6. Step 6: Final answer
    x = 100,376.34

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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.