Home / 138,139.28-207,271.80-67,023.53

Finding the Fourth Proportional to 138,139.28, 207,271.80 and 67,023.53

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Solution

The fourth proportional to 138,139.28, 207,271.80 and 67,023.53 is: 100,565.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,139.28 : 207,271.80 = 67,023.53 : x
  2. Step 2: Convert to fraction form
    138,139.28/207,271.80 = 67,023.53/x
  3. Step 3: Cross multiply
    138,139.28x = 207,271.80 × 67,023.53
  4. Step 4: Simplify right side
    138,139.28x = 13,892,087,705.45
  5. Step 5: Solve for x
    x = 13,892,087,705.45/138,139.28
  6. Step 6: Final answer
    x = 100,565.80

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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.