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Finding the Fourth Proportional to 99,310.74, 137,048.52 and 53,988.67

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Solution

The fourth proportional to 99,310.74, 137,048.52 and 53,988.67 is: 74,504.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,310.74 : 137,048.52 = 53,988.67 : x
  2. Step 2: Convert to fraction form
    99,310.74/137,048.52 = 53,988.67/x
  3. Step 3: Cross multiply
    99,310.74x = 137,048.52 × 53,988.67
  4. Step 4: Simplify right side
    99,310.74x = 7,399,067,320.27
  5. Step 5: Solve for x
    x = 7,399,067,320.27/99,310.74
  6. Step 6: Final answer
    x = 74,504.20

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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.