Home / 129,355.26-178,510.20-72,766.62

Finding the Fourth Proportional to 129,355.26, 178,510.20 and 72,766.62

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Solution

The fourth proportional to 129,355.26, 178,510.20 and 72,766.62 is: 100,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,355.26 : 178,510.20 = 72,766.62 : x
  2. Step 2: Convert to fraction form
    129,355.26/178,510.20 = 72,766.62/x
  3. Step 3: Cross multiply
    129,355.26x = 178,510.20 × 72,766.62
  4. Step 4: Simplify right side
    129,355.26x = 12,989,583,889.52
  5. Step 5: Solve for x
    x = 12,989,583,889.52/129,355.26
  6. Step 6: Final answer
    x = 100,417.90

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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.