Home / 129,516.27-178,735.51-72,159.46

Finding the Fourth Proportional to 129,516.27, 178,735.51 and 72,159.46

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Solution

The fourth proportional to 129,516.27, 178,735.51 and 72,159.46 is: 99,581.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,516.27 : 178,735.51 = 72,159.46 : x
  2. Step 2: Convert to fraction form
    129,516.27/178,735.51 = 72,159.46/x
  3. Step 3: Cross multiply
    129,516.27x = 178,735.51 × 72,159.46
  4. Step 4: Simplify right side
    129,516.27x = 12,897,457,527.79
  5. Step 5: Solve for x
    x = 12,897,457,527.79/129,516.27
  6. Step 6: Final answer
    x = 99,581.76

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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.