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Finding the Fourth Proportional to 139,718.30, 209,542.44 and 59,716.72

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Solution

The fourth proportional to 139,718.30, 209,542.44 and 59,716.72 is: 89,560.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.30 : 209,542.44 = 59,716.72 : x
  2. Step 2: Convert to fraction form
    139,718.30/209,542.44 = 59,716.72/x
  3. Step 3: Cross multiply
    139,718.30x = 209,542.44 × 59,716.72
  4. Step 4: Simplify right side
    139,718.30x = 12,513,187,217.60
  5. Step 5: Solve for x
    x = 12,513,187,217.60/139,718.30
  6. Step 6: Final answer
    x = 89,560.12

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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.