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Finding the Fourth Proportional to 83,390.40, 115,079.43 and 49,400.82

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Solution

The fourth proportional to 83,390.40, 115,079.43 and 49,400.82 is: 68,173.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,390.40 : 115,079.43 = 49,400.82 : x
  2. Step 2: Convert to fraction form
    83,390.40/115,079.43 = 49,400.82/x
  3. Step 3: Cross multiply
    83,390.40x = 115,079.43 × 49,400.82
  4. Step 4: Simplify right side
    83,390.40x = 5,685,018,207.13
  5. Step 5: Solve for x
    x = 5,685,018,207.13/83,390.40
  6. Step 6: Final answer
    x = 68,173.53

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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.