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Finding the Fourth Proportional to 100,674.83, 138,928.33 and 55,352.77

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Solution

The fourth proportional to 100,674.83, 138,928.33 and 55,352.77 is: 76,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,674.83 : 138,928.33 = 55,352.77 : x
  2. Step 2: Convert to fraction form
    100,674.83/138,928.33 = 55,352.77/x
  3. Step 3: Cross multiply
    100,674.83x = 138,928.33 × 55,352.77
  4. Step 4: Simplify right side
    100,674.83x = 7,690,067,618.84
  5. Step 5: Solve for x
    x = 7,690,067,618.84/100,674.83
  6. Step 6: Final answer
    x = 76,385.20

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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.