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Finding the Fourth Proportional to 83,641.65, 125,395.56 and 43,640.58

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Solution

The fourth proportional to 83,641.65, 125,395.56 and 43,640.58 is: 65,425.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,641.65 : 125,395.56 = 43,640.58 : x
  2. Step 2: Convert to fraction form
    83,641.65/125,395.56 = 43,640.58/x
  3. Step 3: Cross multiply
    83,641.65x = 125,395.56 × 43,640.58
  4. Step 4: Simplify right side
    83,641.65x = 5,472,334,967.82
  5. Step 5: Solve for x
    x = 5,472,334,967.82/83,641.65
  6. Step 6: Final answer
    x = 65,425.96

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1.5x scale

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.