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Finding the Fourth Proportional to 81,378.98, 112,306.20 and 45,568.68

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Solution

The fourth proportional to 81,378.98, 112,306.20 and 45,568.68 is: 62,886.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.98 : 112,306.20 = 45,568.68 : x
  2. Step 2: Convert to fraction form
    81,378.98/112,306.20 = 45,568.68/x
  3. Step 3: Cross multiply
    81,378.98x = 112,306.20 × 45,568.68
  4. Step 4: Simplify right side
    81,378.98x = 5,117,645,289.82
  5. Step 5: Solve for x
    x = 5,117,645,289.82/81,378.98
  6. Step 6: Final answer
    x = 62,886.57

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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.