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Finding the Fourth Proportional to 112,279.92, 154,945.92 and 61,978.56

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Solution

The fourth proportional to 112,279.92, 154,945.92 and 61,978.56 is: 85,530.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,279.92 : 154,945.92 = 61,978.56 : x
  2. Step 2: Convert to fraction form
    112,279.92/154,945.92 = 61,978.56/x
  3. Step 3: Cross multiply
    112,279.92x = 154,945.92 × 61,978.56
  4. Step 4: Simplify right side
    112,279.92x = 9,603,324,999.48
  5. Step 5: Solve for x
    x = 9,603,324,999.48/112,279.92
  6. Step 6: Final answer
    x = 85,530.21

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1.5x scale

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.