Home / 121,502.10-182,253.15-86,072.70

Finding the Fourth Proportional to 121,502.10, 182,253.15 and 86,072.70

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Solution

The fourth proportional to 121,502.10, 182,253.15 and 86,072.70 is: 129,109.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,502.10 : 182,253.15 = 86,072.70 : x
  2. Step 2: Convert to fraction form
    121,502.10/182,253.15 = 86,072.70/x
  3. Step 3: Cross multiply
    121,502.10x = 182,253.15 × 86,072.70
  4. Step 4: Simplify right side
    121,502.10x = 15,687,020,704.01
  5. Step 5: Solve for x
    x = 15,687,020,704.01/121,502.10
  6. Step 6: Final answer
    x = 129,109.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.