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Finding the Fourth Proportional to 99,458.03, 137,255 and 54,138.97

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Solution

The fourth proportional to 99,458.03, 137,255 and 54,138.97 is: 74,713.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,458.03 : 137,255 = 54,138.97 : x
  2. Step 2: Convert to fraction form
    99,458.03/137,255 = 54,138.97/x
  3. Step 3: Cross multiply
    99,458.03x = 137,255 × 54,138.97
  4. Step 4: Simplify right side
    99,458.03x = 7,430,844,327.35
  5. Step 5: Solve for x
    x = 7,430,844,327.35/99,458.03
  6. Step 6: Final answer
    x = 74,713.37

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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.