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Finding the Fourth Proportional to 120,881.55, 166,806.78 and 69,897.58

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Solution

The fourth proportional to 120,881.55, 166,806.78 and 69,897.58 is: 96,453.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,881.55 : 166,806.78 = 69,897.58 : x
  2. Step 2: Convert to fraction form
    120,881.55/166,806.78 = 69,897.58/x
  3. Step 3: Cross multiply
    120,881.55x = 166,806.78 × 69,897.58
  4. Step 4: Simplify right side
    120,881.55x = 11,659,390,803.63
  5. Step 5: Solve for x
    x = 11,659,390,803.63/120,881.55
  6. Step 6: Final answer
    x = 96,453.02

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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.