Home / 137,979.75-190,412.24-78,363.75

Finding the Fourth Proportional to 137,979.75, 190,412.24 and 78,363.75

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Solution

The fourth proportional to 137,979.75, 190,412.24 and 78,363.75 is: 108,142.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,979.75 : 190,412.24 = 78,363.75 : x
  2. Step 2: Convert to fraction form
    137,979.75/190,412.24 = 78,363.75/x
  3. Step 3: Cross multiply
    137,979.75x = 190,412.24 × 78,363.75
  4. Step 4: Simplify right side
    137,979.75x = 14,921,416,780.48
  5. Step 5: Solve for x
    x = 14,921,416,780.48/137,979.75
  6. Step 6: Final answer
    x = 108,142.08

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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.