Home / 91,825.20-137,877.12-87,315.12

Finding the Fourth Proportional to 91,825.20, 137,877.12 and 87,315.12

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Solution

The fourth proportional to 91,825.20, 137,877.12 and 87,315.12 is: 131,105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,825.20 : 137,877.12 = 87,315.12 : x
  2. Step 2: Convert to fraction form
    91,825.20/137,877.12 = 87,315.12/x
  3. Step 3: Cross multiply
    91,825.20x = 137,877.12 × 87,315.12
  4. Step 4: Simplify right side
    91,825.20x = 12,038,757,278.05
  5. Step 5: Solve for x
    x = 12,038,757,278.05/91,825.20
  6. Step 6: Final answer
    x = 131,105.16

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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.