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Finding the Fourth Proportional to 101,920.20, 140,645.16 and 56,601.08

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Solution

The fourth proportional to 101,920.20, 140,645.16 and 56,601.08 is: 78,106.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,920.20 : 140,645.16 = 56,601.08 : x
  2. Step 2: Convert to fraction form
    101,920.20/140,645.16 = 56,601.08/x
  3. Step 3: Cross multiply
    101,920.20x = 140,645.16 × 56,601.08
  4. Step 4: Simplify right side
    101,920.20x = 7,960,667,952.77
  5. Step 5: Solve for x
    x = 7,960,667,952.77/101,920.20
  6. Step 6: Final answer
    x = 78,106.87

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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.