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Finding the Fourth Proportional to 86,672.20, 130,008.30 and 49,217.80

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Solution

The fourth proportional to 86,672.20, 130,008.30 and 49,217.80 is: 73,826.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,672.20 : 130,008.30 = 49,217.80 : x
  2. Step 2: Convert to fraction form
    86,672.20/130,008.30 = 49,217.80/x
  3. Step 3: Cross multiply
    86,672.20x = 130,008.30 × 49,217.80
  4. Step 4: Simplify right side
    86,672.20x = 6,398,722,507.74
  5. Step 5: Solve for x
    x = 6,398,722,507.74/86,672.20
  6. Step 6: Final answer
    x = 73,826.70

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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.