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Finding the Fourth Proportional to 139,616.12, 209,424.76 and 43,554.52

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Solution

The fourth proportional to 139,616.12, 209,424.76 and 43,554.52 is: 65,331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,616.12 : 209,424.76 = 43,554.52 : x
  2. Step 2: Convert to fraction form
    139,616.12/209,424.76 = 43,554.52/x
  3. Step 3: Cross multiply
    139,616.12x = 209,424.76 × 43,554.52
  4. Step 4: Simplify right side
    139,616.12x = 9,121,394,897.92
  5. Step 5: Solve for x
    x = 9,121,394,897.92/139,616.12
  6. Step 6: Final answer
    x = 65,331.96

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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.