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Finding the Fourth Proportional to 87,612.55, 120,905.24 and 47,326.30

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Solution

The fourth proportional to 87,612.55, 120,905.24 and 47,326.30 is: 65,310.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,612.55 : 120,905.24 = 47,326.30 : x
  2. Step 2: Convert to fraction form
    87,612.55/120,905.24 = 47,326.30/x
  3. Step 3: Cross multiply
    87,612.55x = 120,905.24 × 47,326.30
  4. Step 4: Simplify right side
    87,612.55x = 5,721,997,659.81
  5. Step 5: Solve for x
    x = 5,721,997,659.81/87,612.55
  6. Step 6: Final answer
    x = 65,310.25

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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.