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Finding the Fourth Proportional to 99,308.76, 137,048.74 and 53,989.80

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Solution

The fourth proportional to 99,308.76, 137,048.74 and 53,989.80 is: 74,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,308.76 : 137,048.74 = 53,989.80 : x
  2. Step 2: Convert to fraction form
    99,308.76/137,048.74 = 53,989.80/x
  3. Step 3: Cross multiply
    99,308.76x = 137,048.74 × 53,989.80
  4. Step 4: Simplify right side
    99,308.76x = 7,399,234,062.85
  5. Step 5: Solve for x
    x = 7,399,234,062.85/99,308.76
  6. Step 6: Final answer
    x = 74,507.37

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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.