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Finding the Fourth Proportional to 170,998.90, 256,498.35 and 71,125.90

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Solution

The fourth proportional to 170,998.90, 256,498.35 and 71,125.90 is: 106,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,998.90 : 256,498.35 = 71,125.90 : x
  2. Step 2: Convert to fraction form
    170,998.90/256,498.35 = 71,125.90/x
  3. Step 3: Cross multiply
    170,998.90x = 256,498.35 × 71,125.90
  4. Step 4: Simplify right side
    170,998.90x = 18,243,675,992.27
  5. Step 5: Solve for x
    x = 18,243,675,992.27/170,998.90
  6. Step 6: Final answer
    x = 106,688.85

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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.