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Finding the Fourth Proportional to 91,905.55, 137,760.31 and 52,377.55

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Solution

The fourth proportional to 91,905.55, 137,760.31 and 52,377.55 is: 78,510.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,905.55 : 137,760.31 = 52,377.55 : x
  2. Step 2: Convert to fraction form
    91,905.55/137,760.31 = 52,377.55/x
  3. Step 3: Cross multiply
    91,905.55x = 137,760.31 × 52,377.55
  4. Step 4: Simplify right side
    91,905.55x = 7,215,547,246.11
  5. Step 5: Solve for x
    x = 7,215,547,246.11/91,905.55
  6. Step 6: Final answer
    x = 78,510.46

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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.