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Finding the Fourth Proportional to 122,695.78, 170,003.36 and 120,038.57

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Solution

The fourth proportional to 122,695.78, 170,003.36 and 120,038.57 is: 166,321.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,695.78 : 170,003.36 = 120,038.57 : x
  2. Step 2: Convert to fraction form
    122,695.78/170,003.36 = 120,038.57/x
  3. Step 3: Cross multiply
    122,695.78x = 170,003.36 × 120,038.57
  4. Step 4: Simplify right side
    122,695.78x = 20,406,960,229.60
  5. Step 5: Solve for x
    x = 20,406,960,229.60/122,695.78
  6. Step 6: Final answer
    x = 166,321.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.