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Finding the Fourth Proportional to 123,571.20, 185,313.60 and 64,387.20

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Solution

The fourth proportional to 123,571.20, 185,313.60 and 64,387.20 is: 96,558.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,571.20 : 185,313.60 = 64,387.20 : x
  2. Step 2: Convert to fraction form
    123,571.20/185,313.60 = 64,387.20/x
  3. Step 3: Cross multiply
    123,571.20x = 185,313.60 × 64,387.20
  4. Step 4: Simplify right side
    123,571.20x = 11,931,823,825.92
  5. Step 5: Solve for x
    x = 11,931,823,825.92/123,571.20
  6. Step 6: Final answer
    x = 96,558.29

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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.