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Finding the Fourth Proportional to 171,644.70, 257,467.05 and 145,724.70

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Solution

The fourth proportional to 171,644.70, 257,467.05 and 145,724.70 is: 218,587.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,644.70 : 257,467.05 = 145,724.70 : x
  2. Step 2: Convert to fraction form
    171,644.70/257,467.05 = 145,724.70/x
  3. Step 3: Cross multiply
    171,644.70x = 257,467.05 × 145,724.70
  4. Step 4: Simplify right side
    171,644.70x = 37,519,308,621.14
  5. Step 5: Solve for x
    x = 37,519,308,621.14/171,644.70
  6. Step 6: Final answer
    x = 218,587.05

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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.