Home / 165,429.15-247,979.70-81,120.30

Finding the Fourth Proportional to 165,429.15, 247,979.70 and 81,120.30

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Solution

The fourth proportional to 165,429.15, 247,979.70 and 81,120.30 is: 121,600.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,429.15 : 247,979.70 = 81,120.30 : x
  2. Step 2: Convert to fraction form
    165,429.15/247,979.70 = 81,120.30/x
  3. Step 3: Cross multiply
    165,429.15x = 247,979.70 × 81,120.30
  4. Step 4: Simplify right side
    165,429.15x = 20,116,187,657.91
  5. Step 5: Solve for x
    x = 20,116,187,657.91/165,429.15
  6. Step 6: Final answer
    x = 121,600.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.