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Finding the Fourth Proportional to 206,045.40, 309,068.10 and 72,924.60

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Solution

The fourth proportional to 206,045.40, 309,068.10 and 72,924.60 is: 109,386.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,045.40 : 309,068.10 = 72,924.60 : x
  2. Step 2: Convert to fraction form
    206,045.40/309,068.10 = 72,924.60/x
  3. Step 3: Cross multiply
    206,045.40x = 309,068.10 × 72,924.60
  4. Step 4: Simplify right side
    206,045.40x = 22,538,667,565.26
  5. Step 5: Solve for x
    x = 22,538,667,565.26/206,045.40
  6. Step 6: Final answer
    x = 109,386.90

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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.