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Finding the Fourth Proportional to 86,156.68, 129,338.70 and 51,320.20

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Solution

The fourth proportional to 86,156.68, 129,338.70 and 51,320.20 is: 77,042.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,156.68 : 129,338.70 = 51,320.20 : x
  2. Step 2: Convert to fraction form
    86,156.68/129,338.70 = 51,320.20/x
  3. Step 3: Cross multiply
    86,156.68x = 129,338.70 × 51,320.20
  4. Step 4: Simplify right side
    86,156.68x = 6,637,687,951.74
  5. Step 5: Solve for x
    x = 6,637,687,951.74/86,156.68
  6. Step 6: Final answer
    x = 77,042.06

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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.