Home / 80,731.60-121,097.46-38,601.78

Finding the Fourth Proportional to 80,731.60, 121,097.46 and 38,601.78

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Solution

The fourth proportional to 80,731.60, 121,097.46 and 38,601.78 is: 57,902.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,731.60 : 121,097.46 = 38,601.78 : x
  2. Step 2: Convert to fraction form
    80,731.60/121,097.46 = 38,601.78/x
  3. Step 3: Cross multiply
    80,731.60x = 121,097.46 × 38,601.78
  4. Step 4: Simplify right side
    80,731.60x = 4,674,577,509.48
  5. Step 5: Solve for x
    x = 4,674,577,509.48/80,731.60
  6. Step 6: Final answer
    x = 57,902.70

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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.