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Finding the Fourth Proportional to 91,726.90, 137,719.95 and 56,734.90

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Solution

The fourth proportional to 91,726.90, 137,719.95 and 56,734.90 is: 85,182.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,726.90 : 137,719.95 = 56,734.90 : x
  2. Step 2: Convert to fraction form
    91,726.90/137,719.95 = 56,734.90/x
  3. Step 3: Cross multiply
    91,726.90x = 137,719.95 × 56,734.90
  4. Step 4: Simplify right side
    91,726.90x = 7,813,527,591.26
  5. Step 5: Solve for x
    x = 7,813,527,591.26/91,726.90
  6. Step 6: Final answer
    x = 85,182.51

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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.