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Finding the Fourth Proportional to 90,110.88, 135,774.54 and 74,659.73

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Solution

The fourth proportional to 90,110.88, 135,774.54 and 74,659.73 is: 112,493.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,110.88 : 135,774.54 = 74,659.73 : x
  2. Step 2: Convert to fraction form
    90,110.88/135,774.54 = 74,659.73/x
  3. Step 3: Cross multiply
    90,110.88x = 135,774.54 × 74,659.73
  4. Step 4: Simplify right side
    90,110.88x = 10,136,889,818.40
  5. Step 5: Solve for x
    x = 10,136,889,818.40/90,110.88
  6. Step 6: Final answer
    x = 112,493.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.