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Finding the Fourth Proportional to 59,939.88, 89,901.24 and 20,491.20

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Solution

The fourth proportional to 59,939.88, 89,901.24 and 20,491.20 is: 30,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,939.88 : 89,901.24 = 20,491.20 : x
  2. Step 2: Convert to fraction form
    59,939.88/89,901.24 = 20,491.20/x
  3. Step 3: Cross multiply
    59,939.88x = 89,901.24 × 20,491.20
  4. Step 4: Simplify right side
    59,939.88x = 1,842,184,289.09
  5. Step 5: Solve for x
    x = 1,842,184,289.09/59,939.88
  6. Step 6: Final answer
    x = 30,733.87

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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.