Home / 100,731.15-138,998.07-58,281.75

Finding the Fourth Proportional to 100,731.15, 138,998.07 and 58,281.75

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Solution

The fourth proportional to 100,731.15, 138,998.07 and 58,281.75 is: 80,422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,731.15 : 138,998.07 = 58,281.75 : x
  2. Step 2: Convert to fraction form
    100,731.15/138,998.07 = 58,281.75/x
  3. Step 3: Cross multiply
    100,731.15x = 138,998.07 × 58,281.75
  4. Step 4: Simplify right side
    100,731.15x = 8,101,050,766.22
  5. Step 5: Solve for x
    x = 8,101,050,766.22/100,731.15
  6. Step 6: Final answer
    x = 80,422.50

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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.