Home / 90,719.20-136,062.60-57,379.60

Finding the Fourth Proportional to 90,719.20, 136,062.60 and 57,379.60

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Solution

The fourth proportional to 90,719.20, 136,062.60 and 57,379.60 is: 86,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,719.20 : 136,062.60 = 57,379.60 : x
  2. Step 2: Convert to fraction form
    90,719.20/136,062.60 = 57,379.60/x
  3. Step 3: Cross multiply
    90,719.20x = 136,062.60 × 57,379.60
  4. Step 4: Simplify right side
    90,719.20x = 7,807,217,562.96
  5. Step 5: Solve for x
    x = 7,807,217,562.96/90,719.20
  6. Step 6: Final answer
    x = 86,059.15

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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.