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Finding the Fourth Proportional to 90,040.80, 134,978.64 and 34,595.04

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Solution

The fourth proportional to 90,040.80, 134,978.64 and 34,595.04 is: 51,860.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,040.80 : 134,978.64 = 34,595.04 : x
  2. Step 2: Convert to fraction form
    90,040.80/134,978.64 = 34,595.04/x
  3. Step 3: Cross multiply
    90,040.80x = 134,978.64 × 34,595.04
  4. Step 4: Simplify right side
    90,040.80x = 4,669,591,449.95
  5. Step 5: Solve for x
    x = 4,669,591,449.95/90,040.80
  6. Step 6: Final answer
    x = 51,860.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.