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Finding the Fourth Proportional to 92,839.01, 128,138.90 and 58,894.34

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Solution

The fourth proportional to 92,839.01, 128,138.90 and 58,894.34 is: 81,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,839.01 : 128,138.90 = 58,894.34 : x
  2. Step 2: Convert to fraction form
    92,839.01/128,138.90 = 58,894.34/x
  3. Step 3: Cross multiply
    92,839.01x = 128,138.90 × 58,894.34
  4. Step 4: Simplify right side
    92,839.01x = 7,546,655,008.66
  5. Step 5: Solve for x
    x = 7,546,655,008.66/92,839.01
  6. Step 6: Final answer
    x = 81,287.55

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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.