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Finding the Fourth Proportional to 100,337.79, 138,464.57 and 55,016.16

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Solution

The fourth proportional to 100,337.79, 138,464.57 and 55,016.16 is: 75,921.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,337.79 : 138,464.57 = 55,016.16 : x
  2. Step 2: Convert to fraction form
    100,337.79/138,464.57 = 55,016.16/x
  3. Step 3: Cross multiply
    100,337.79x = 138,464.57 × 55,016.16
  4. Step 4: Simplify right side
    100,337.79x = 7,617,788,662.37
  5. Step 5: Solve for x
    x = 7,617,788,662.37/100,337.79
  6. Step 6: Final answer
    x = 75,921.43

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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.