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Finding the Fourth Proportional to 170,998.61, 256,502.33 and 81,020.21

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Solution

The fourth proportional to 170,998.61, 256,502.33 and 81,020.21 is: 121,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,998.61 : 256,502.33 = 81,020.21 : x
  2. Step 2: Convert to fraction form
    170,998.61/256,502.33 = 81,020.21/x
  3. Step 3: Cross multiply
    170,998.61x = 256,502.33 × 81,020.21
  4. Step 4: Simplify right side
    170,998.61x = 20,781,872,236.99
  5. Step 5: Solve for x
    x = 20,781,872,236.99/170,998.61
  6. Step 6: Final answer
    x = 121,532.40

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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.