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Finding the Fourth Proportional to 171,456.40, 257,221.36 and 87,228.32

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Solution

The fourth proportional to 171,456.40, 257,221.36 and 87,228.32 is: 130,861.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,456.40 : 257,221.36 = 87,228.32 : x
  2. Step 2: Convert to fraction form
    171,456.40/257,221.36 = 87,228.32/x
  3. Step 3: Cross multiply
    171,456.40x = 257,221.36 × 87,228.32
  4. Step 4: Simplify right side
    171,456.40x = 22,436,987,100.92
  5. Step 5: Solve for x
    x = 22,436,987,100.92/171,456.40
  6. Step 6: Final answer
    x = 130,861.18

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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.