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Finding the Fourth Proportional to 122,606.78, 169,212.99 and 74,849.90

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Solution

The fourth proportional to 122,606.78, 169,212.99 and 74,849.90 is: 103,302.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,606.78 : 169,212.99 = 74,849.90 : x
  2. Step 2: Convert to fraction form
    122,606.78/169,212.99 = 74,849.90/x
  3. Step 3: Cross multiply
    122,606.78x = 169,212.99 × 74,849.90
  4. Step 4: Simplify right side
    122,606.78x = 12,665,575,380.20
  5. Step 5: Solve for x
    x = 12,665,575,380.20/122,606.78
  6. Step 6: Final answer
    x = 103,302.41

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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.