Home / 138,342.10-207,707.55-85,854.10

Finding the Fourth Proportional to 138,342.10, 207,707.55 and 85,854.10

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Solution

The fourth proportional to 138,342.10, 207,707.55 and 85,854.10 is: 128,901.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,342.10 : 207,707.55 = 85,854.10 : x
  2. Step 2: Convert to fraction form
    138,342.10/207,707.55 = 85,854.10/x
  3. Step 3: Cross multiply
    138,342.10x = 207,707.55 × 85,854.10
  4. Step 4: Simplify right side
    138,342.10x = 17,832,544,768.46
  5. Step 5: Solve for x
    x = 17,832,544,768.46/138,342.10
  6. Step 6: Final answer
    x = 128,901.79

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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.