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Finding the Fourth Proportional to 89,070.78, 122,858.54 and 57,279.90

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Solution

The fourth proportional to 89,070.78, 122,858.54 and 57,279.90 is: 79,008.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,070.78 : 122,858.54 = 57,279.90 : x
  2. Step 2: Convert to fraction form
    89,070.78/122,858.54 = 57,279.90/x
  3. Step 3: Cross multiply
    89,070.78x = 122,858.54 × 57,279.90
  4. Step 4: Simplify right side
    89,070.78x = 7,037,324,885.35
  5. Step 5: Solve for x
    x = 7,037,324,885.35/89,070.78
  6. Step 6: Final answer
    x = 79,008.23

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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.