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Finding the Fourth Proportional to 90,491.95, 135,760.98 and 63,889.76

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Solution

The fourth proportional to 90,491.95, 135,760.98 and 63,889.76 is: 95,850.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,491.95 : 135,760.98 = 63,889.76 : x
  2. Step 2: Convert to fraction form
    90,491.95/135,760.98 = 63,889.76/x
  3. Step 3: Cross multiply
    90,491.95x = 135,760.98 × 63,889.76
  4. Step 4: Simplify right side
    90,491.95x = 8,673,736,429.56
  5. Step 5: Solve for x
    x = 8,673,736,429.56/90,491.95
  6. Step 6: Final answer
    x = 95,850.92

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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.