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Finding the Fourth Proportional to 215,708.80, 323,563.20 and 121,230.40

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Solution

The fourth proportional to 215,708.80, 323,563.20 and 121,230.40 is: 181,845.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,708.80 : 323,563.20 = 121,230.40 : x
  2. Step 2: Convert to fraction form
    215,708.80/323,563.20 = 121,230.40/x
  3. Step 3: Cross multiply
    215,708.80x = 323,563.20 × 121,230.40
  4. Step 4: Simplify right side
    215,708.80x = 39,225,696,161.28
  5. Step 5: Solve for x
    x = 39,225,696,161.28/215,708.80
  6. Step 6: Final answer
    x = 181,845.60

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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.