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Finding the Fourth Proportional to 86,819.70, 130,156.65 and 45,266.70

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Solution

The fourth proportional to 86,819.70, 130,156.65 and 45,266.70 is: 67,862.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,819.70 : 130,156.65 = 45,266.70 : x
  2. Step 2: Convert to fraction form
    86,819.70/130,156.65 = 45,266.70/x
  3. Step 3: Cross multiply
    86,819.70x = 130,156.65 × 45,266.70
  4. Step 4: Simplify right side
    86,819.70x = 5,891,762,028.56
  5. Step 5: Solve for x
    x = 5,891,762,028.56/86,819.70
  6. Step 6: Final answer
    x = 67,862.04

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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.