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Finding the Fourth Proportional to 215,940.80, 323,911.20 and 121,462.40

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Solution

The fourth proportional to 215,940.80, 323,911.20 and 121,462.40 is: 182,193.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,940.80 : 323,911.20 = 121,462.40 : x
  2. Step 2: Convert to fraction form
    215,940.80/323,911.20 = 121,462.40/x
  3. Step 3: Cross multiply
    215,940.80x = 323,911.20 × 121,462.40
  4. Step 4: Simplify right side
    215,940.80x = 39,343,031,738.88
  5. Step 5: Solve for x
    x = 39,343,031,738.88/215,940.80
  6. Step 6: Final answer
    x = 182,193.60

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1.5x scale

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.