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Finding the Fourth Proportional to 87,270.40, 130,819.20 and 42,860.80

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Solution

The fourth proportional to 87,270.40, 130,819.20 and 42,860.80 is: 64,248.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,270.40 : 130,819.20 = 42,860.80 : x
  2. Step 2: Convert to fraction form
    87,270.40/130,819.20 = 42,860.80/x
  3. Step 3: Cross multiply
    87,270.40x = 130,819.20 × 42,860.80
  4. Step 4: Simplify right side
    87,270.40x = 5,607,015,567.36
  5. Step 5: Solve for x
    x = 5,607,015,567.36/87,270.40
  6. Step 6: Final answer
    x = 64,248.77

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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.