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Finding the Fourth Proportional to 171,920.10, 257,880.15 and 124,680.90

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Solution

The fourth proportional to 171,920.10, 257,880.15 and 124,680.90 is: 187,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,920.10 : 257,880.15 = 124,680.90 : x
  2. Step 2: Convert to fraction form
    171,920.10/257,880.15 = 124,680.90/x
  3. Step 3: Cross multiply
    171,920.10x = 257,880.15 × 124,680.90
  4. Step 4: Simplify right side
    171,920.10x = 32,152,729,194.14
  5. Step 5: Solve for x
    x = 32,152,729,194.14/171,920.10
  6. Step 6: Final answer
    x = 187,021.35

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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.