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Finding the Fourth Proportional to 171,507.90, 257,261.97 and 71,613.66

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Solution

The fourth proportional to 171,507.90, 257,261.97 and 71,613.66 is: 107,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,507.90 : 257,261.97 = 71,613.66 : x
  2. Step 2: Convert to fraction form
    171,507.90/257,261.97 = 71,613.66/x
  3. Step 3: Cross multiply
    171,507.90x = 257,261.97 × 71,613.66
  4. Step 4: Simplify right side
    171,507.90x = 18,423,471,250.51
  5. Step 5: Solve for x
    x = 18,423,471,250.51/171,507.90
  6. Step 6: Final answer
    x = 107,420.54

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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.