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Finding the Fourth Proportional to 78,997.97, 109,012.79 and 43,180.85

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Solution

The fourth proportional to 78,997.97, 109,012.79 and 43,180.85 is: 59,587.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,997.97 : 109,012.79 = 43,180.85 : x
  2. Step 2: Convert to fraction form
    78,997.97/109,012.79 = 43,180.85/x
  3. Step 3: Cross multiply
    78,997.97x = 109,012.79 × 43,180.85
  4. Step 4: Simplify right side
    78,997.97x = 4,707,264,717.17
  5. Step 5: Solve for x
    x = 4,707,264,717.17/78,997.97
  6. Step 6: Final answer
    x = 59,587.16

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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.