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Finding the Fourth Proportional to 207,225.78, 285,972 and 122,348.30

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Solution

The fourth proportional to 207,225.78, 285,972 and 122,348.30 is: 168,840.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,225.78 : 285,972 = 122,348.30 : x
  2. Step 2: Convert to fraction form
    207,225.78/285,972 = 122,348.30/x
  3. Step 3: Cross multiply
    207,225.78x = 285,972 × 122,348.30
  4. Step 4: Simplify right side
    207,225.78x = 34,988,188,047.60
  5. Step 5: Solve for x
    x = 34,988,188,047.60/207,225.78
  6. Step 6: Final answer
    x = 168,840.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.