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Finding the Fourth Proportional to 122,165.20, 168,580.20 and 71,854.48

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Solution

The fourth proportional to 122,165.20, 168,580.20 and 71,854.48 is: 99,154.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,165.20 : 168,580.20 = 71,854.48 : x
  2. Step 2: Convert to fraction form
    122,165.20/168,580.20 = 71,854.48/x
  3. Step 3: Cross multiply
    122,165.20x = 168,580.20 × 71,854.48
  4. Step 4: Simplify right side
    122,165.20x = 12,113,242,609.30
  5. Step 5: Solve for x
    x = 12,113,242,609.30/122,165.20
  6. Step 6: Final answer
    x = 99,154.61

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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.