Home / 209,921.20-314,663.10-115,005.40

Finding the Fourth Proportional to 209,921.20, 314,663.10 and 115,005.40

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Solution

The fourth proportional to 209,921.20, 314,663.10 and 115,005.40 is: 172,388.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,921.20 : 314,663.10 = 115,005.40 : x
  2. Step 2: Convert to fraction form
    209,921.20/314,663.10 = 115,005.40/x
  3. Step 3: Cross multiply
    209,921.20x = 314,663.10 × 115,005.40
  4. Step 4: Simplify right side
    209,921.20x = 36,187,955,680.74
  5. Step 5: Solve for x
    x = 36,187,955,680.74/209,921.20
  6. Step 6: Final answer
    x = 172,388.29

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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.