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Finding the Fourth Proportional to 89,891.78, 124,021.13 and 58,079.43

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Solution

The fourth proportional to 89,891.78, 124,021.13 and 58,079.43 is: 80,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,891.78 : 124,021.13 = 58,079.43 : x
  2. Step 2: Convert to fraction form
    89,891.78/124,021.13 = 58,079.43/x
  3. Step 3: Cross multiply
    89,891.78x = 124,021.13 × 58,079.43
  4. Step 4: Simplify right side
    89,891.78x = 7,203,076,247.96
  5. Step 5: Solve for x
    x = 7,203,076,247.96/89,891.78
  6. Step 6: Final answer
    x = 80,130.54

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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.