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Finding the Fourth Proportional to 85,937.52, 128,901.08 and 51,098.88

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Solution

The fourth proportional to 85,937.52, 128,901.08 and 51,098.88 is: 76,645.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,937.52 : 128,901.08 = 51,098.88 : x
  2. Step 2: Convert to fraction form
    85,937.52/128,901.08 = 51,098.88/x
  3. Step 3: Cross multiply
    85,937.52x = 128,901.08 × 51,098.88
  4. Step 4: Simplify right side
    85,937.52x = 6,586,700,818.79
  5. Step 5: Solve for x
    x = 6,586,700,818.79/85,937.52
  6. Step 6: Final answer
    x = 76,645.23

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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.