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Finding the Fourth Proportional to 122,422.32, 168,938.40 and 68,709.60

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Solution

The fourth proportional to 122,422.32, 168,938.40 and 68,709.60 is: 94,816.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,422.32 : 168,938.40 = 68,709.60 : x
  2. Step 2: Convert to fraction form
    122,422.32/168,938.40 = 68,709.60/x
  3. Step 3: Cross multiply
    122,422.32x = 168,938.40 × 68,709.60
  4. Step 4: Simplify right side
    122,422.32x = 11,607,689,888.64
  5. Step 5: Solve for x
    x = 11,607,689,888.64/122,422.32
  6. Step 6: Final answer
    x = 94,816.78

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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.