Home / 129,478.67-178,697.60-72,901.07

Finding the Fourth Proportional to 129,478.67, 178,697.60 and 72,901.07

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Solution

The fourth proportional to 129,478.67, 178,697.60 and 72,901.07 is: 100,613.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,478.67 : 178,697.60 = 72,901.07 : x
  2. Step 2: Convert to fraction form
    129,478.67/178,697.60 = 72,901.07/x
  3. Step 3: Cross multiply
    129,478.67x = 178,697.60 × 72,901.07
  4. Step 4: Simplify right side
    129,478.67x = 13,027,246,246.43
  5. Step 5: Solve for x
    x = 13,027,246,246.43/129,478.67
  6. Step 6: Final answer
    x = 100,613.07

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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.