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Finding the Fourth Proportional to 81,259.20, 112,168.80 and 49,426.20

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Solution

The fourth proportional to 81,259.20, 112,168.80 and 49,426.20 is: 68,227.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.20 : 112,168.80 = 49,426.20 : x
  2. Step 2: Convert to fraction form
    81,259.20/112,168.80 = 49,426.20/x
  3. Step 3: Cross multiply
    81,259.20x = 112,168.80 × 49,426.20
  4. Step 4: Simplify right side
    81,259.20x = 5,544,077,542.56
  5. Step 5: Solve for x
    x = 5,544,077,542.56/81,259.20
  6. Step 6: Final answer
    x = 68,227.08

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1.5x scale

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.