Home / 99,987.40-137,982.98-54,664.68

Finding the Fourth Proportional to 99,987.40, 137,982.98 and 54,664.68

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Solution

The fourth proportional to 99,987.40, 137,982.98 and 54,664.68 is: 75,437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,987.40 : 137,982.98 = 54,664.68 : x
  2. Step 2: Convert to fraction form
    99,987.40/137,982.98 = 54,664.68/x
  3. Step 3: Cross multiply
    99,987.40x = 137,982.98 × 54,664.68
  4. Step 4: Simplify right side
    99,987.40x = 7,542,795,447.15
  5. Step 5: Solve for x
    x = 7,542,795,447.15/99,987.40
  6. Step 6: Final answer
    x = 75,437.46

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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.