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Finding the Fourth Proportional to 90,603.80, 135,905.70 and 77,481.80

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Solution

The fourth proportional to 90,603.80, 135,905.70 and 77,481.80 is: 116,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,603.80 : 135,905.70 = 77,481.80 : x
  2. Step 2: Convert to fraction form
    90,603.80/135,905.70 = 77,481.80/x
  3. Step 3: Cross multiply
    90,603.80x = 135,905.70 × 77,481.80
  4. Step 4: Simplify right side
    90,603.80x = 10,530,218,266.26
  5. Step 5: Solve for x
    x = 10,530,218,266.26/90,603.80
  6. Step 6: Final answer
    x = 116,222.70

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1.5x scale

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.