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Finding the Fourth Proportional to 91,264.58, 125,943.78 and 50,978.90

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Solution

The fourth proportional to 91,264.58, 125,943.78 and 50,978.90 is: 70,350.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,264.58 : 125,943.78 = 50,978.90 : x
  2. Step 2: Convert to fraction form
    91,264.58/125,943.78 = 50,978.90/x
  3. Step 3: Cross multiply
    91,264.58x = 125,943.78 × 50,978.90
  4. Step 4: Simplify right side
    91,264.58x = 6,420,475,366.24
  5. Step 5: Solve for x
    x = 6,420,475,366.24/91,264.58
  6. Step 6: Final answer
    x = 70,350.13

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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.