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Finding the Fourth Proportional to 115,410.30, 173,115.45 and 108,411.90

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Solution

The fourth proportional to 115,410.30, 173,115.45 and 108,411.90 is: 162,617.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,410.30 : 173,115.45 = 108,411.90 : x
  2. Step 2: Convert to fraction form
    115,410.30/173,115.45 = 108,411.90/x
  3. Step 3: Cross multiply
    115,410.30x = 173,115.45 × 108,411.90
  4. Step 4: Simplify right side
    115,410.30x = 18,767,774,853.86
  5. Step 5: Solve for x
    x = 18,767,774,853.86/115,410.30
  6. Step 6: Final answer
    x = 162,617.85

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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.