Home / 129,305.73-178,426.23-71,931.49

Finding the Fourth Proportional to 129,305.73, 178,426.23 and 71,931.49

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Solution

The fourth proportional to 129,305.73, 178,426.23 and 71,931.49 is: 99,256.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,305.73 : 178,426.23 = 71,931.49 : x
  2. Step 2: Convert to fraction form
    129,305.73/178,426.23 = 71,931.49/x
  3. Step 3: Cross multiply
    129,305.73x = 178,426.23 × 71,931.49
  4. Step 4: Simplify right side
    129,305.73x = 12,834,464,132.92
  5. Step 5: Solve for x
    x = 12,834,464,132.92/129,305.73
  6. Step 6: Final answer
    x = 99,256.73

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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.