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Finding the Fourth Proportional to 75,760.91, 113,641.31 and 20,356.91

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Solution

The fourth proportional to 75,760.91, 113,641.31 and 20,356.91 is: 30,535.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,760.91 : 113,641.31 = 20,356.91 : x
  2. Step 2: Convert to fraction form
    75,760.91/113,641.31 = 20,356.91/x
  3. Step 3: Cross multiply
    75,760.91x = 113,641.31 × 20,356.91
  4. Step 4: Simplify right side
    75,760.91x = 2,313,385,818.17
  5. Step 5: Solve for x
    x = 2,313,385,818.17/75,760.91
  6. Step 6: Final answer
    x = 30,535.35

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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.