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Finding the Fourth Proportional to 139,368.14, 209,060.13 and 39,520.43

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Solution

The fourth proportional to 139,368.14, 209,060.13 and 39,520.43 is: 59,282.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,368.14 : 209,060.13 = 39,520.43 : x
  2. Step 2: Convert to fraction form
    139,368.14/209,060.13 = 39,520.43/x
  3. Step 3: Cross multiply
    139,368.14x = 209,060.13 × 39,520.43
  4. Step 4: Simplify right side
    139,368.14x = 8,262,146,233.46
  5. Step 5: Solve for x
    x = 8,262,146,233.46/139,368.14
  6. Step 6: Final answer
    x = 59,282.89

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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.