Home / 87,819.50-121,157.83-57,621.49

Finding the Fourth Proportional to 87,819.50, 121,157.83 and 57,621.49

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Solution

The fourth proportional to 87,819.50, 121,157.83 and 57,621.49 is: 79,495.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,819.50 : 121,157.83 = 57,621.49 : x
  2. Step 2: Convert to fraction form
    87,819.50/121,157.83 = 57,621.49/x
  3. Step 3: Cross multiply
    87,819.50x = 121,157.83 × 57,621.49
  4. Step 4: Simplify right side
    87,819.50x = 6,981,294,689.77
  5. Step 5: Solve for x
    x = 6,981,294,689.77/87,819.50
  6. Step 6: Final answer
    x = 79,495.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.