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Finding the Fourth Proportional to 171,219.70, 257,060.40 and 100,215.10

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Solution

The fourth proportional to 171,219.70, 257,060.40 and 100,215.10 is: 150,457.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,219.70 : 257,060.40 = 100,215.10 : x
  2. Step 2: Convert to fraction form
    171,219.70/257,060.40 = 100,215.10/x
  3. Step 3: Cross multiply
    171,219.70x = 257,060.40 × 100,215.10
  4. Step 4: Simplify right side
    171,219.70x = 25,761,333,692.04
  5. Step 5: Solve for x
    x = 25,761,333,692.04/171,219.70
  6. Step 6: Final answer
    x = 150,457.77

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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.