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Finding the Fourth Proportional to 88,289.82, 121,839.02 and 65,729.70

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Solution

The fourth proportional to 88,289.82, 121,839.02 and 65,729.70 is: 90,706.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,289.82 : 121,839.02 = 65,729.70 : x
  2. Step 2: Convert to fraction form
    88,289.82/121,839.02 = 65,729.70/x
  3. Step 3: Cross multiply
    88,289.82x = 121,839.02 × 65,729.70
  4. Step 4: Simplify right side
    88,289.82x = 8,008,442,232.89
  5. Step 5: Solve for x
    x = 8,008,442,232.89/88,289.82
  6. Step 6: Final answer
    x = 90,706.29

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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.