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Finding the Fourth Proportional to 109,665.54, 151,337.16 and 61,920.90

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Solution

The fourth proportional to 109,665.54, 151,337.16 and 61,920.90 is: 85,450.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,665.54 : 151,337.16 = 61,920.90 : x
  2. Step 2: Convert to fraction form
    109,665.54/151,337.16 = 61,920.90/x
  3. Step 3: Cross multiply
    109,665.54x = 151,337.16 × 61,920.90
  4. Step 4: Simplify right side
    109,665.54x = 9,370,933,150.64
  5. Step 5: Solve for x
    x = 9,370,933,150.64/109,665.54
  6. Step 6: Final answer
    x = 85,450.12

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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.