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Finding the Fourth Proportional to 79,721.64, 109,950.42 and 58,187.16

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Solution

The fourth proportional to 79,721.64, 109,950.42 and 58,187.16 is: 80,250.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,721.64 : 109,950.42 = 58,187.16 : x
  2. Step 2: Convert to fraction form
    79,721.64/109,950.42 = 58,187.16/x
  3. Step 3: Cross multiply
    79,721.64x = 109,950.42 × 58,187.16
  4. Step 4: Simplify right side
    79,721.64x = 6,397,702,680.61
  5. Step 5: Solve for x
    x = 6,397,702,680.61/79,721.64
  6. Step 6: Final answer
    x = 80,250.52

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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.