Home / 129,585.28-178,829.76-72,229.36

Finding the Fourth Proportional to 129,585.28, 178,829.76 and 72,229.36

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Solution

The fourth proportional to 129,585.28, 178,829.76 and 72,229.36 is: 99,677.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,585.28 : 178,829.76 = 72,229.36 : x
  2. Step 2: Convert to fraction form
    129,585.28/178,829.76 = 72,229.36/x
  3. Step 3: Cross multiply
    129,585.28x = 178,829.76 × 72,229.36
  4. Step 4: Simplify right side
    129,585.28x = 12,916,759,113.75
  5. Step 5: Solve for x
    x = 12,916,759,113.75/129,585.28
  6. Step 6: Final answer
    x = 99,677.67

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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.