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Finding the Fourth Proportional to 139,419.50, 192,400.08 and 75,757.30

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Solution

The fourth proportional to 139,419.50, 192,400.08 and 75,757.30 is: 104,545.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.50 : 192,400.08 = 75,757.30 : x
  2. Step 2: Convert to fraction form
    139,419.50/192,400.08 = 75,757.30/x
  3. Step 3: Cross multiply
    139,419.50x = 192,400.08 × 75,757.30
  4. Step 4: Simplify right side
    139,419.50x = 14,575,710,580.58
  5. Step 5: Solve for x
    x = 14,575,710,580.58/139,419.50
  6. Step 6: Final answer
    x = 104,545.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.