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Finding the Fourth Proportional to 170,998.48, 256,544.70 and 71,205.40

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Solution

The fourth proportional to 170,998.48, 256,544.70 and 71,205.40 is: 106,827.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,998.48 : 256,544.70 = 71,205.40 : x
  2. Step 2: Convert to fraction form
    170,998.48/256,544.70 = 71,205.40/x
  3. Step 3: Cross multiply
    170,998.48x = 256,544.70 × 71,205.40
  4. Step 4: Simplify right side
    170,998.48x = 18,267,367,981.38
  5. Step 5: Solve for x
    x = 18,267,367,981.38/170,998.48
  6. Step 6: Final answer
    x = 106,827.66

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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.