Home / 90,990.28-136,437.90-28,644.04

Finding the Fourth Proportional to 90,990.28, 136,437.90 and 28,644.04

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Solution

The fourth proportional to 90,990.28, 136,437.90 and 28,644.04 is: 42,951.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,990.28 : 136,437.90 = 28,644.04 : x
  2. Step 2: Convert to fraction form
    90,990.28/136,437.90 = 28,644.04/x
  3. Step 3: Cross multiply
    90,990.28x = 136,437.90 × 28,644.04
  4. Step 4: Simplify right side
    90,990.28x = 3,908,132,665.12
  5. Step 5: Solve for x
    x = 3,908,132,665.12/90,990.28
  6. Step 6: Final answer
    x = 42,951.10

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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.