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Finding the Fourth Proportional to 100,353.64, 138,494.18 and 55,641.64

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Solution

The fourth proportional to 100,353.64, 138,494.18 and 55,641.64 is: 76,788.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,353.64 : 138,494.18 = 55,641.64 : x
  2. Step 2: Convert to fraction form
    100,353.64/138,494.18 = 55,641.64/x
  3. Step 3: Cross multiply
    100,353.64x = 138,494.18 × 55,641.64
  4. Step 4: Simplify right side
    100,353.64x = 7,706,043,305.66
  5. Step 5: Solve for x
    x = 7,706,043,305.66/100,353.64
  6. Step 6: Final answer
    x = 76,788.88

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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.