Home / 91,121.15-125,635.47-74,931.89

Finding the Fourth Proportional to 91,121.15, 125,635.47 and 74,931.89

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Solution

The fourth proportional to 91,121.15, 125,635.47 and 74,931.89 is: 103,314.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,121.15 : 125,635.47 = 74,931.89 : x
  2. Step 2: Convert to fraction form
    91,121.15/125,635.47 = 74,931.89/x
  3. Step 3: Cross multiply
    91,121.15x = 125,635.47 × 74,931.89
  4. Step 4: Simplify right side
    91,121.15x = 9,414,102,589.96
  5. Step 5: Solve for x
    x = 9,414,102,589.96/91,121.15
  6. Step 6: Final answer
    x = 103,314.13

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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.