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Finding the Fourth Proportional to 81,673.96, 112,715.66 and 45,379.78

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Solution

The fourth proportional to 81,673.96, 112,715.66 and 45,379.78 is: 62,627.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,673.96 : 112,715.66 = 45,379.78 : x
  2. Step 2: Convert to fraction form
    81,673.96/112,715.66 = 45,379.78/x
  3. Step 3: Cross multiply
    81,673.96x = 112,715.66 × 45,379.78
  4. Step 4: Simplify right side
    81,673.96x = 5,115,011,853.35
  5. Step 5: Solve for x
    x = 5,115,011,853.35/81,673.96
  6. Step 6: Final answer
    x = 62,627.21

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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.