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Finding the Fourth Proportional to 168,728.40, 253,384.20 and 89,996.40

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Solution

The fourth proportional to 168,728.40, 253,384.20 and 89,996.40 is: 135,150.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,728.40 : 253,384.20 = 89,996.40 : x
  2. Step 2: Convert to fraction form
    168,728.40/253,384.20 = 89,996.40/x
  3. Step 3: Cross multiply
    168,728.40x = 253,384.20 × 89,996.40
  4. Step 4: Simplify right side
    168,728.40x = 22,803,665,816.88
  5. Step 5: Solve for x
    x = 22,803,665,816.88/168,728.40
  6. Step 6: Final answer
    x = 135,150.13

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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.