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Finding the Fourth Proportional to 215,602.80, 323,389.08 and 80,641.20

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Solution

The fourth proportional to 215,602.80, 323,389.08 and 80,641.20 is: 120,956.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,602.80 : 323,389.08 = 80,641.20 : x
  2. Step 2: Convert to fraction form
    215,602.80/323,389.08 = 80,641.20/x
  3. Step 3: Cross multiply
    215,602.80x = 323,389.08 × 80,641.20
  4. Step 4: Simplify right side
    215,602.80x = 26,078,483,478.10
  5. Step 5: Solve for x
    x = 26,078,483,478.10/215,602.80
  6. Step 6: Final answer
    x = 120,956.14

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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.