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Finding the Fourth Proportional to 139,572.78, 209,360.43 and 39,732.93

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Solution

The fourth proportional to 139,572.78, 209,360.43 and 39,732.93 is: 59,599.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.78 : 209,360.43 = 39,732.93 : x
  2. Step 2: Convert to fraction form
    139,572.78/209,360.43 = 39,732.93/x
  3. Step 3: Cross multiply
    139,572.78x = 209,360.43 × 39,732.93
  4. Step 4: Simplify right side
    139,572.78x = 8,318,503,309.96
  5. Step 5: Solve for x
    x = 8,318,503,309.96/139,572.78
  6. Step 6: Final answer
    x = 59,599.75

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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.