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Finding the Fourth Proportional to 71,963.40, 99,340.20 and 45,121.20

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Solution

The fourth proportional to 71,963.40, 99,340.20 and 45,121.20 is: 62,286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,963.40 : 99,340.20 = 45,121.20 : x
  2. Step 2: Convert to fraction form
    71,963.40/99,340.20 = 45,121.20/x
  3. Step 3: Cross multiply
    71,963.40x = 99,340.20 × 45,121.20
  4. Step 4: Simplify right side
    71,963.40x = 4,482,349,032.24
  5. Step 5: Solve for x
    x = 4,482,349,032.24/71,963.40
  6. Step 6: Final answer
    x = 62,286.51

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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.