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Finding the Fourth Proportional to 209,927.80, 314,891.70 and 115,449.40

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Solution

The fourth proportional to 209,927.80, 314,891.70 and 115,449.40 is: 173,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,927.80 : 314,891.70 = 115,449.40 : x
  2. Step 2: Convert to fraction form
    209,927.80/314,891.70 = 115,449.40/x
  3. Step 3: Cross multiply
    209,927.80x = 314,891.70 × 115,449.40
  4. Step 4: Simplify right side
    209,927.80x = 36,354,057,829.98
  5. Step 5: Solve for x
    x = 36,354,057,829.98/209,927.80
  6. Step 6: Final answer
    x = 173,174.10

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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.