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Finding the Fourth Proportional to 65,373.75, 90,218.70 and 38,517.39

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Solution

The fourth proportional to 65,373.75, 90,218.70 and 38,517.39 is: 53,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,373.75 : 90,218.70 = 38,517.39 : x
  2. Step 2: Convert to fraction form
    65,373.75/90,218.70 = 38,517.39/x
  3. Step 3: Cross multiply
    65,373.75x = 90,218.70 × 38,517.39
  4. Step 4: Simplify right side
    65,373.75x = 3,474,988,853.19
  5. Step 5: Solve for x
    x = 3,474,988,853.19/65,373.75
  6. Step 6: Final answer
    x = 53,155.72

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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.