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Finding the Fourth Proportional to 139,352.38, 209,032.91 and 66,306.32

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Solution

The fourth proportional to 139,352.38, 209,032.91 and 66,306.32 is: 99,461.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,352.38 : 209,032.91 = 66,306.32 : x
  2. Step 2: Convert to fraction form
    139,352.38/209,032.91 = 66,306.32/x
  3. Step 3: Cross multiply
    139,352.38x = 209,032.91 × 66,306.32
  4. Step 4: Simplify right side
    139,352.38x = 13,860,203,212.04
  5. Step 5: Solve for x
    x = 13,860,203,212.04/139,352.38
  6. Step 6: Final answer
    x = 99,461.55

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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.