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Finding the Fourth Proportional to 101,920.40, 140,627.46 and 61,633.32

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Solution

The fourth proportional to 101,920.40, 140,627.46 and 61,633.32 is: 85,040.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,920.40 : 140,627.46 = 61,633.32 : x
  2. Step 2: Convert to fraction form
    101,920.40/140,627.46 = 61,633.32/x
  3. Step 3: Cross multiply
    101,920.40x = 140,627.46 × 61,633.32
  4. Step 4: Simplify right side
    101,920.40x = 8,667,337,242.97
  5. Step 5: Solve for x
    x = 8,667,337,242.97/101,920.40
  6. Step 6: Final answer
    x = 85,040.26

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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.