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Finding the Fourth Proportional to 139,686.85, 209,562.81 and 39,848.41

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Solution

The fourth proportional to 139,686.85, 209,562.81 and 39,848.41 is: 59,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,686.85 : 209,562.81 = 39,848.41 : x
  2. Step 2: Convert to fraction form
    139,686.85/209,562.81 = 39,848.41/x
  3. Step 3: Cross multiply
    139,686.85x = 209,562.81 × 39,848.41
  4. Step 4: Simplify right side
    139,686.85x = 8,350,744,773.63
  5. Step 5: Solve for x
    x = 8,350,744,773.63/139,686.85
  6. Step 6: Final answer
    x = 59,781.90

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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.