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Finding the Fourth Proportional to 100,251.45, 138,346.98 and 54,931.14

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Solution

The fourth proportional to 100,251.45, 138,346.98 and 54,931.14 is: 75,804.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,251.45 : 138,346.98 = 54,931.14 : x
  2. Step 2: Convert to fraction form
    100,251.45/138,346.98 = 54,931.14/x
  3. Step 3: Cross multiply
    100,251.45x = 138,346.98 × 54,931.14
  4. Step 4: Simplify right side
    100,251.45x = 7,599,557,326.96
  5. Step 5: Solve for x
    x = 7,599,557,326.96/100,251.45
  6. Step 6: Final answer
    x = 75,804.96

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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.