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Finding the Fourth Proportional to 87,543.70, 130,482.78 and 82,560.98

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Solution

The fourth proportional to 87,543.70, 130,482.78 and 82,560.98 is: 123,056.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,543.70 : 130,482.78 = 82,560.98 : x
  2. Step 2: Convert to fraction form
    87,543.70/130,482.78 = 82,560.98/x
  3. Step 3: Cross multiply
    87,543.70x = 130,482.78 × 82,560.98
  4. Step 4: Simplify right side
    87,543.70x = 10,772,786,189.92
  5. Step 5: Solve for x
    x = 10,772,786,189.92/87,543.70
  6. Step 6: Final answer
    x = 123,056.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.