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Finding the Fourth Proportional to 88,383.74, 121,934.70 and 65,469.38

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Solution

The fourth proportional to 88,383.74, 121,934.70 and 65,469.38 is: 90,321.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,383.74 : 121,934.70 = 65,469.38 : x
  2. Step 2: Convert to fraction form
    88,383.74/121,934.70 = 65,469.38/x
  3. Step 3: Cross multiply
    88,383.74x = 121,934.70 × 65,469.38
  4. Step 4: Simplify right side
    88,383.74x = 7,982,988,599.81
  5. Step 5: Solve for x
    x = 7,982,988,599.81/88,383.74
  6. Step 6: Final answer
    x = 90,321.92

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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.