Home / 129,293.28-178,423.56-72,705.06

Finding the Fourth Proportional to 129,293.28, 178,423.56 and 72,705.06

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Solution

The fourth proportional to 129,293.28, 178,423.56 and 72,705.06 is: 100,332.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,293.28 : 178,423.56 = 72,705.06 : x
  2. Step 2: Convert to fraction form
    129,293.28/178,423.56 = 72,705.06/x
  3. Step 3: Cross multiply
    129,293.28x = 178,423.56 × 72,705.06
  4. Step 4: Simplify right side
    129,293.28x = 12,972,295,635.21
  5. Step 5: Solve for x
    x = 12,972,295,635.21/129,293.28
  6. Step 6: Final answer
    x = 100,332.33

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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.