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Finding the Fourth Proportional to 207,209.67, 309,634.95 and 155,581.75

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Solution

The fourth proportional to 207,209.67, 309,634.95 and 155,581.75 is: 232,486.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,209.67 : 309,634.95 = 155,581.75 : x
  2. Step 2: Convert to fraction form
    207,209.67/309,634.95 = 155,581.75/x
  3. Step 3: Cross multiply
    207,209.67x = 309,634.95 × 155,581.75
  4. Step 4: Simplify right side
    207,209.67x = 48,173,547,382.16
  5. Step 5: Solve for x
    x = 48,173,547,382.16/207,209.67
  6. Step 6: Final answer
    x = 232,486.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.