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Finding the Fourth Proportional to 122,612.68, 169,215.30 and 68,900.20

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Solution

The fourth proportional to 122,612.68, 169,215.30 and 68,900.20 is: 95,087.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,612.68 : 169,215.30 = 68,900.20 : x
  2. Step 2: Convert to fraction form
    122,612.68/169,215.30 = 68,900.20/x
  3. Step 3: Cross multiply
    122,612.68x = 169,215.30 × 68,900.20
  4. Step 4: Simplify right side
    122,612.68x = 11,658,968,013.06
  5. Step 5: Solve for x
    x = 11,658,968,013.06/122,612.68
  6. Step 6: Final answer
    x = 95,087.78

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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.