Home / 209,009.20-313,319.40-145,829.20

Finding the Fourth Proportional to 209,009.20, 313,319.40 and 145,829.20

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Solution

The fourth proportional to 209,009.20, 313,319.40 and 145,829.20 is: 218,608.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,009.20 : 313,319.40 = 145,829.20 : x
  2. Step 2: Convert to fraction form
    209,009.20/313,319.40 = 145,829.20/x
  3. Step 3: Cross multiply
    209,009.20x = 313,319.40 × 145,829.20
  4. Step 4: Simplify right side
    209,009.20x = 45,691,117,446.48
  5. Step 5: Solve for x
    x = 45,691,117,446.48/209,009.20
  6. Step 6: Final answer
    x = 218,608.16

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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.