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Finding the Fourth Proportional to 122,628.61, 169,225.22 and 68,912.85

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Solution

The fourth proportional to 122,628.61, 169,225.22 and 68,912.85 is: 95,098.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,628.61 : 169,225.22 = 68,912.85 : x
  2. Step 2: Convert to fraction form
    122,628.61/169,225.22 = 68,912.85/x
  3. Step 3: Cross multiply
    122,628.61x = 169,225.22 × 68,912.85
  4. Step 4: Simplify right side
    122,628.61x = 11,661,791,857.51
  5. Step 5: Solve for x
    x = 11,661,791,857.51/122,628.61
  6. Step 6: Final answer
    x = 95,098.46

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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.