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Finding the Fourth Proportional to 75,335.92, 103,991.52 and 64,682.80

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Solution

The fourth proportional to 75,335.92, 103,991.52 and 64,682.80 is: 89,286.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,335.92 : 103,991.52 = 64,682.80 : x
  2. Step 2: Convert to fraction form
    75,335.92/103,991.52 = 64,682.80/x
  3. Step 3: Cross multiply
    75,335.92x = 103,991.52 × 64,682.80
  4. Step 4: Simplify right side
    75,335.92x = 6,726,462,689.86
  5. Step 5: Solve for x
    x = 6,726,462,689.86/75,335.92
  6. Step 6: Final answer
    x = 89,286.26

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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.