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Finding the Fourth Proportional to 87,168.80, 130,688.40 and 47,770.40

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Solution

The fourth proportional to 87,168.80, 130,688.40 and 47,770.40 is: 71,620.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,168.80 : 130,688.40 = 47,770.40 : x
  2. Step 2: Convert to fraction form
    87,168.80/130,688.40 = 47,770.40/x
  3. Step 3: Cross multiply
    87,168.80x = 130,688.40 × 47,770.40
  4. Step 4: Simplify right side
    87,168.80x = 6,243,037,143.36
  5. Step 5: Solve for x
    x = 6,243,037,143.36/87,168.80
  6. Step 6: Final answer
    x = 71,620.09

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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.