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Finding the Fourth Proportional to 80,753.87, 121,138.88 and 30,875.93

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Solution

The fourth proportional to 80,753.87, 121,138.88 and 30,875.93 is: 46,316.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,753.87 : 121,138.88 = 30,875.93 : x
  2. Step 2: Convert to fraction form
    80,753.87/121,138.88 = 30,875.93/x
  3. Step 3: Cross multiply
    80,753.87x = 121,138.88 × 30,875.93
  4. Step 4: Simplify right side
    80,753.87x = 3,740,275,579.16
  5. Step 5: Solve for x
    x = 3,740,275,579.16/80,753.87
  6. Step 6: Final answer
    x = 46,316.98

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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.