Home / 129,389.92-178,557.76-72,801.36

Finding the Fourth Proportional to 129,389.92, 178,557.76 and 72,801.36

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Solution

The fourth proportional to 129,389.92, 178,557.76 and 72,801.36 is: 100,465.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,389.92 : 178,557.76 = 72,801.36 : x
  2. Step 2: Convert to fraction form
    129,389.92/178,557.76 = 72,801.36/x
  3. Step 3: Cross multiply
    129,389.92x = 178,557.76 × 72,801.36
  4. Step 4: Simplify right side
    129,389.92x = 12,999,247,766.55
  5. Step 5: Solve for x
    x = 12,999,247,766.55/129,389.92
  6. Step 6: Final answer
    x = 100,465.69

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1.5x scale

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.