Home / 91,812.90-137,719.35-91,229.70

Finding the Fourth Proportional to 91,812.90, 137,719.35 and 91,229.70

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Solution

The fourth proportional to 91,812.90, 137,719.35 and 91,229.70 is: 136,844.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,812.90 : 137,719.35 = 91,229.70 : x
  2. Step 2: Convert to fraction form
    91,812.90/137,719.35 = 91,229.70/x
  3. Step 3: Cross multiply
    91,812.90x = 137,719.35 × 91,229.70
  4. Step 4: Simplify right side
    91,812.90x = 12,564,094,984.70
  5. Step 5: Solve for x
    x = 12,564,094,984.70/91,812.90
  6. Step 6: Final answer
    x = 136,844.55

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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.