Home / 81,193.28-121,790.56-28,590.72

Finding the Fourth Proportional to 81,193.28, 121,790.56 and 28,590.72

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Solution

The fourth proportional to 81,193.28, 121,790.56 and 28,590.72 is: 42,886.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,193.28 : 121,790.56 = 28,590.72 : x
  2. Step 2: Convert to fraction form
    81,193.28/121,790.56 = 28,590.72/x
  3. Step 3: Cross multiply
    81,193.28x = 121,790.56 × 28,590.72
  4. Step 4: Simplify right side
    81,193.28x = 3,482,079,799.60
  5. Step 5: Solve for x
    x = 3,482,079,799.60/81,193.28
  6. Step 6: Final answer
    x = 42,886.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.