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Finding the Fourth Proportional to 171,221.80, 257,139.90 and 124,527.40

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Solution

The fourth proportional to 171,221.80, 257,139.90 and 124,527.40 is: 187,014.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,221.80 : 257,139.90 = 124,527.40 : x
  2. Step 2: Convert to fraction form
    171,221.80/257,139.90 = 124,527.40/x
  3. Step 3: Cross multiply
    171,221.80x = 257,139.90 × 124,527.40
  4. Step 4: Simplify right side
    171,221.80x = 32,020,963,183.26
  5. Step 5: Solve for x
    x = 32,020,963,183.26/171,221.80
  6. Step 6: Final answer
    x = 187,014.52

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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.