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Finding the Fourth Proportional to 99,699.36, 137,584.48 and 54,987.36

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Solution

The fourth proportional to 99,699.36, 137,584.48 and 54,987.36 is: 75,882.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,699.36 : 137,584.48 = 54,987.36 : x
  2. Step 2: Convert to fraction form
    99,699.36/137,584.48 = 54,987.36/x
  3. Step 3: Cross multiply
    99,699.36x = 137,584.48 × 54,987.36
  4. Step 4: Simplify right side
    99,699.36x = 7,565,407,332.17
  5. Step 5: Solve for x
    x = 7,565,407,332.17/99,699.36
  6. Step 6: Final answer
    x = 75,882.21

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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.