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Finding the Fourth Proportional to 101,729.92, 140,383.52 and 56,408.72

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Solution

The fourth proportional to 101,729.92, 140,383.52 and 56,408.72 is: 77,841.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,729.92 : 140,383.52 = 56,408.72 : x
  2. Step 2: Convert to fraction form
    101,729.92/140,383.52 = 56,408.72/x
  3. Step 3: Cross multiply
    101,729.92x = 140,383.52 × 56,408.72
  4. Step 4: Simplify right side
    101,729.92x = 7,918,854,672.29
  5. Step 5: Solve for x
    x = 7,918,854,672.29/101,729.92
  6. Step 6: Final answer
    x = 77,841.94

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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.