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Finding the Fourth Proportional to 139,542.40, 209,362.20 and 60,713.20

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Solution

The fourth proportional to 139,542.40, 209,362.20 and 60,713.20 is: 91,090.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,542.40 : 209,362.20 = 60,713.20 : x
  2. Step 2: Convert to fraction form
    139,542.40/209,362.20 = 60,713.20/x
  3. Step 3: Cross multiply
    139,542.40x = 209,362.20 × 60,713.20
  4. Step 4: Simplify right side
    139,542.40x = 12,711,049,121.04
  5. Step 5: Solve for x
    x = 12,711,049,121.04/139,542.40
  6. Step 6: Final answer
    x = 91,090.95

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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.