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Finding the Fourth Proportional to 78,981.48, 108,982.26 and 45,441

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Solution

The fourth proportional to 78,981.48, 108,982.26 and 45,441 is: 62,701.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,981.48 : 108,982.26 = 45,441 : x
  2. Step 2: Convert to fraction form
    78,981.48/108,982.26 = 45,441/x
  3. Step 3: Cross multiply
    78,981.48x = 108,982.26 × 45,441
  4. Step 4: Simplify right side
    78,981.48x = 4,952,262,876.66
  5. Step 5: Solve for x
    x = 4,952,262,876.66/78,981.48
  6. Step 6: Final answer
    x = 62,701.57

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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.