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Finding the Fourth Proportional to 90,601.10, 135,901.65 and 84,040.10

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Solution

The fourth proportional to 90,601.10, 135,901.65 and 84,040.10 is: 126,060.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,601.10 : 135,901.65 = 84,040.10 : x
  2. Step 2: Convert to fraction form
    90,601.10/135,901.65 = 84,040.10/x
  3. Step 3: Cross multiply
    90,601.10x = 135,901.65 × 84,040.10
  4. Step 4: Simplify right side
    90,601.10x = 11,421,188,256.17
  5. Step 5: Solve for x
    x = 11,421,188,256.17/90,601.10
  6. Step 6: Final answer
    x = 126,060.15

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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.