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Finding the Fourth Proportional to 99,393.88, 137,164.16 and 54,072.28

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Solution

The fourth proportional to 99,393.88, 137,164.16 and 54,072.28 is: 74,620.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,393.88 : 137,164.16 = 54,072.28 : x
  2. Step 2: Convert to fraction form
    99,393.88/137,164.16 = 54,072.28/x
  3. Step 3: Cross multiply
    99,393.88x = 137,164.16 × 54,072.28
  4. Step 4: Simplify right side
    99,393.88x = 7,416,778,865.48
  5. Step 5: Solve for x
    x = 7,416,778,865.48/99,393.88
  6. Step 6: Final answer
    x = 74,620.08

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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.