Home / 215,876.81-297,911.30-120,389.55

Finding the Fourth Proportional to 215,876.81, 297,911.30 and 120,389.55

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Solution

The fourth proportional to 215,876.81, 297,911.30 and 120,389.55 is: 166,138.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,876.81 : 297,911.30 = 120,389.55 : x
  2. Step 2: Convert to fraction form
    215,876.81/297,911.30 = 120,389.55/x
  3. Step 3: Cross multiply
    215,876.81x = 297,911.30 × 120,389.55
  4. Step 4: Simplify right side
    215,876.81x = 35,865,407,346.92
  5. Step 5: Solve for x
    x = 35,865,407,346.92/215,876.81
  6. Step 6: Final answer
    x = 166,138.31

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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.