Home / 129,545.12-178,767.54-72,181.47

Finding the Fourth Proportional to 129,545.12, 178,767.54 and 72,181.47

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Solution

The fourth proportional to 129,545.12, 178,767.54 and 72,181.47 is: 99,607.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,545.12 : 178,767.54 = 72,181.47 : x
  2. Step 2: Convert to fraction form
    129,545.12/178,767.54 = 72,181.47/x
  3. Step 3: Cross multiply
    129,545.12x = 178,767.54 × 72,181.47
  4. Step 4: Simplify right side
    129,545.12x = 12,903,704,766.54
  5. Step 5: Solve for x
    x = 12,903,704,766.54/129,545.12
  6. Step 6: Final answer
    x = 99,607.80

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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.