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Finding the Fourth Proportional to 215,959.10, 323,938.65 and 103,620.20

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Solution

The fourth proportional to 215,959.10, 323,938.65 and 103,620.20 is: 155,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,959.10 : 323,938.65 = 103,620.20 : x
  2. Step 2: Convert to fraction form
    215,959.10/323,938.65 = 103,620.20/x
  3. Step 3: Cross multiply
    215,959.10x = 323,938.65 × 103,620.20
  4. Step 4: Simplify right side
    215,959.10x = 33,566,587,700.73
  5. Step 5: Solve for x
    x = 33,566,587,700.73/215,959.10
  6. Step 6: Final answer
    x = 155,430.30

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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.