Home / 129,581.60-178,825.56-72,226.80

Finding the Fourth Proportional to 129,581.60, 178,825.56 and 72,226.80

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Solution

The fourth proportional to 129,581.60, 178,825.56 and 72,226.80 is: 99,674.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.60 : 178,825.56 = 72,226.80 : x
  2. Step 2: Convert to fraction form
    129,581.60/178,825.56 = 72,226.80/x
  3. Step 3: Cross multiply
    129,581.60x = 178,825.56 × 72,226.80
  4. Step 4: Simplify right side
    129,581.60x = 12,915,997,957.01
  5. Step 5: Solve for x
    x = 12,915,997,957.01/129,581.60
  6. Step 6: Final answer
    x = 99,674.63

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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.