Home / 99,821.60-149,732.40-40,699.70

Finding the Fourth Proportional to 99,821.60, 149,732.40 and 40,699.70

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Solution

The fourth proportional to 99,821.60, 149,732.40 and 40,699.70 is: 61,049.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,821.60 : 149,732.40 = 40,699.70 : x
  2. Step 2: Convert to fraction form
    99,821.60/149,732.40 = 40,699.70/x
  3. Step 3: Cross multiply
    99,821.60x = 149,732.40 × 40,699.70
  4. Step 4: Simplify right side
    99,821.60x = 6,094,063,760.28
  5. Step 5: Solve for x
    x = 6,094,063,760.28/99,821.60
  6. Step 6: Final answer
    x = 61,049.55

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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.