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Finding the Fourth Proportional to 206,143.60, 309,215.40 and 101,167.60

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Solution

The fourth proportional to 206,143.60, 309,215.40 and 101,167.60 is: 151,751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,143.60 : 309,215.40 = 101,167.60 : x
  2. Step 2: Convert to fraction form
    206,143.60/309,215.40 = 101,167.60/x
  3. Step 3: Cross multiply
    206,143.60x = 309,215.40 × 101,167.60
  4. Step 4: Simplify right side
    206,143.60x = 31,282,579,901.04
  5. Step 5: Solve for x
    x = 31,282,579,901.04/206,143.60
  6. Step 6: Final answer
    x = 151,751.40

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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.