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Finding the Fourth Proportional to 120,866.28, 166,748.94 and 89,110.68

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Solution

The fourth proportional to 120,866.28, 166,748.94 and 89,110.68 is: 122,938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,866.28 : 166,748.94 = 89,110.68 : x
  2. Step 2: Convert to fraction form
    120,866.28/166,748.94 = 89,110.68/x
  3. Step 3: Cross multiply
    120,866.28x = 166,748.94 × 89,110.68
  4. Step 4: Simplify right side
    120,866.28x = 14,859,111,432.68
  5. Step 5: Solve for x
    x = 14,859,111,432.68/120,866.28
  6. Step 6: Final answer
    x = 122,938.44

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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.