Home / 99,705.12-137,590.88-54,993.12

Finding the Fourth Proportional to 99,705.12, 137,590.88 and 54,993.12

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Solution

The fourth proportional to 99,705.12, 137,590.88 and 54,993.12 is: 75,889.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,705.12 : 137,590.88 = 54,993.12 : x
  2. Step 2: Convert to fraction form
    99,705.12/137,590.88 = 54,993.12/x
  3. Step 3: Cross multiply
    99,705.12x = 137,590.88 × 54,993.12
  4. Step 4: Simplify right side
    99,705.12x = 7,566,551,774.75
  5. Step 5: Solve for x
    x = 7,566,551,774.75/99,705.12
  6. Step 6: Final answer
    x = 75,889.30

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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.