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Finding the Fourth Proportional to 100,597.12, 138,771.97 and 68,333.40

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Solution

The fourth proportional to 100,597.12, 138,771.97 and 68,333.40 is: 94,264.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,597.12 : 138,771.97 = 68,333.40 : x
  2. Step 2: Convert to fraction form
    100,597.12/138,771.97 = 68,333.40/x
  3. Step 3: Cross multiply
    100,597.12x = 138,771.97 × 68,333.40
  4. Step 4: Simplify right side
    100,597.12x = 9,482,760,534.80
  5. Step 5: Solve for x
    x = 9,482,760,534.80/100,597.12
  6. Step 6: Final answer
    x = 94,264.73

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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.