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Finding the Fourth Proportional to 88,293.84, 121,764.78 and 65,689.44

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Solution

The fourth proportional to 88,293.84, 121,764.78 and 65,689.44 is: 90,591.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,293.84 : 121,764.78 = 65,689.44 : x
  2. Step 2: Convert to fraction form
    88,293.84/121,764.78 = 65,689.44/x
  3. Step 3: Cross multiply
    88,293.84x = 121,764.78 × 65,689.44
  4. Step 4: Simplify right side
    88,293.84x = 7,998,660,209.92
  5. Step 5: Solve for x
    x = 7,998,660,209.92/88,293.84
  6. Step 6: Final answer
    x = 90,591.37

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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.