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Finding the Fourth Proportional to 99,395.88, 137,162.80 and 54,072.60

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Solution

The fourth proportional to 99,395.88, 137,162.80 and 54,072.60 is: 74,618.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,395.88 : 137,162.80 = 54,072.60 : x
  2. Step 2: Convert to fraction form
    99,395.88/137,162.80 = 54,072.60/x
  3. Step 3: Cross multiply
    99,395.88x = 137,162.80 × 54,072.60
  4. Step 4: Simplify right side
    99,395.88x = 7,416,749,219.28
  5. Step 5: Solve for x
    x = 7,416,749,219.28/99,395.88
  6. Step 6: Final answer
    x = 74,618.28

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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.