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Finding the Fourth Proportional to 81,381.70, 112,304.13 and 45,081.65

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Solution

The fourth proportional to 81,381.70, 112,304.13 and 45,081.65 is: 62,211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.70 : 112,304.13 = 45,081.65 : x
  2. Step 2: Convert to fraction form
    81,381.70/112,304.13 = 45,081.65/x
  3. Step 3: Cross multiply
    81,381.70x = 112,304.13 × 45,081.65
  4. Step 4: Simplify right side
    81,381.70x = 5,062,855,482.21
  5. Step 5: Solve for x
    x = 5,062,855,482.21/81,381.70
  6. Step 6: Final answer
    x = 62,211.23

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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.