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Finding the Fourth Proportional to 80,654.64, 111,309.65 and 48,390.48

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Solution

The fourth proportional to 80,654.64, 111,309.65 and 48,390.48 is: 66,782.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,654.64 : 111,309.65 = 48,390.48 : x
  2. Step 2: Convert to fraction form
    80,654.64/111,309.65 = 48,390.48/x
  3. Step 3: Cross multiply
    80,654.64x = 111,309.65 × 48,390.48
  4. Step 4: Simplify right side
    80,654.64x = 5,386,327,150.18
  5. Step 5: Solve for x
    x = 5,386,327,150.18/80,654.64
  6. Step 6: Final answer
    x = 66,782.61

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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.