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Finding the Fourth Proportional to 91,812.30, 137,718.45 and 63,818.70

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Solution

The fourth proportional to 91,812.30, 137,718.45 and 63,818.70 is: 95,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,812.30 : 137,718.45 = 63,818.70 : x
  2. Step 2: Convert to fraction form
    91,812.30/137,718.45 = 63,818.70/x
  3. Step 3: Cross multiply
    91,812.30x = 137,718.45 × 63,818.70
  4. Step 4: Simplify right side
    91,812.30x = 8,789,012,445.02
  5. Step 5: Solve for x
    x = 8,789,012,445.02/91,812.30
  6. Step 6: Final answer
    x = 95,728.05

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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.