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Finding the Fourth Proportional to 85,943.52, 128,910.08 and 51,104.88

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Solution

The fourth proportional to 85,943.52, 128,910.08 and 51,104.88 is: 76,654.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,943.52 : 128,910.08 = 51,104.88 : x
  2. Step 2: Convert to fraction form
    85,943.52/128,910.08 = 51,104.88/x
  3. Step 3: Cross multiply
    85,943.52x = 128,910.08 × 51,104.88
  4. Step 4: Simplify right side
    85,943.52x = 6,587,934,169.19
  5. Step 5: Solve for x
    x = 6,587,934,169.19/85,943.52
  6. Step 6: Final answer
    x = 76,654.23

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1.5x scale

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.