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Finding the Fourth Proportional to 81,379.70, 112,301.37 and 45,079.65

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Solution

The fourth proportional to 81,379.70, 112,301.37 and 45,079.65 is: 62,208.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,379.70 : 112,301.37 = 45,079.65 : x
  2. Step 2: Convert to fraction form
    81,379.70/112,301.37 = 45,079.65/x
  3. Step 3: Cross multiply
    81,379.70x = 112,301.37 × 45,079.65
  4. Step 4: Simplify right side
    81,379.70x = 5,062,506,454.12
  5. Step 5: Solve for x
    x = 5,062,506,454.12/81,379.70
  6. Step 6: Final answer
    x = 62,208.47

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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.