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Finding the Fourth Proportional to 139,835.45, 209,565.46 and 76,560.08

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Solution

The fourth proportional to 139,835.45, 209,565.46 and 76,560.08 is: 114,737.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,835.45 : 209,565.46 = 76,560.08 : x
  2. Step 2: Convert to fraction form
    139,835.45/209,565.46 = 76,560.08/x
  3. Step 3: Cross multiply
    139,835.45x = 209,565.46 × 76,560.08
  4. Step 4: Simplify right side
    139,835.45x = 16,044,347,143.61
  5. Step 5: Solve for x
    x = 16,044,347,143.61/139,835.45
  6. Step 6: Final answer
    x = 114,737.33

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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.