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Finding the Fourth Proportional to 83,111.64, 125,228.46 and 68,644.62

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Solution

The fourth proportional to 83,111.64, 125,228.46 and 68,644.62 is: 103,430.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,111.64 : 125,228.46 = 68,644.62 : x
  2. Step 2: Convert to fraction form
    83,111.64/125,228.46 = 68,644.62/x
  3. Step 3: Cross multiply
    83,111.64x = 125,228.46 × 68,644.62
  4. Step 4: Simplify right side
    83,111.64x = 8,596,260,049.89
  5. Step 5: Solve for x
    x = 8,596,260,049.89/83,111.64
  6. Step 6: Final answer
    x = 103,430.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.