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Finding the Fourth Proportional to 100,473.39, 138,654.84 and 55,155.51

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Solution

The fourth proportional to 100,473.39, 138,654.84 and 55,155.51 is: 76,115.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,473.39 : 138,654.84 = 55,155.51 : x
  2. Step 2: Convert to fraction form
    100,473.39/138,654.84 = 55,155.51/x
  3. Step 3: Cross multiply
    100,473.39x = 138,654.84 × 55,155.51
  4. Step 4: Simplify right side
    100,473.39x = 7,647,578,621.00
  5. Step 5: Solve for x
    x = 7,647,578,621.00/100,473.39
  6. Step 6: Final answer
    x = 76,115.46

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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.