Home / 90,415.68-135,623.49-30,439.11

Finding the Fourth Proportional to 90,415.68, 135,623.49 and 30,439.11

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Solution

The fourth proportional to 90,415.68, 135,623.49 and 30,439.11 is: 45,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,415.68 : 135,623.49 = 30,439.11 : x
  2. Step 2: Convert to fraction form
    90,415.68/135,623.49 = 30,439.11/x
  3. Step 3: Cross multiply
    90,415.68x = 135,623.49 × 30,439.11
  4. Step 4: Simplify right side
    90,415.68x = 4,128,258,330.69
  5. Step 5: Solve for x
    x = 4,128,258,330.69/90,415.68
  6. Step 6: Final answer
    x = 45,658.65

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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.