Home / 99,343.70-137,145.10-76,631.72

Finding the Fourth Proportional to 99,343.70, 137,145.10 and 76,631.72

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Solution

The fourth proportional to 99,343.70, 137,145.10 and 76,631.72 is: 105,790.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,343.70 : 137,145.10 = 76,631.72 : x
  2. Step 2: Convert to fraction form
    99,343.70/137,145.10 = 76,631.72/x
  3. Step 3: Cross multiply
    99,343.70x = 137,145.10 × 76,631.72
  4. Step 4: Simplify right side
    99,343.70x = 10,509,664,902.57
  5. Step 5: Solve for x
    x = 10,509,664,902.57/99,343.70
  6. Step 6: Final answer
    x = 105,790.96

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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.