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Finding the Fourth Proportional to 64,687.20, 89,273.52 and 36,391.20

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Solution

The fourth proportional to 64,687.20, 89,273.52 and 36,391.20 is: 50,222.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,687.20 : 89,273.52 = 36,391.20 : x
  2. Step 2: Convert to fraction form
    64,687.20/89,273.52 = 36,391.20/x
  3. Step 3: Cross multiply
    64,687.20x = 89,273.52 × 36,391.20
  4. Step 4: Simplify right side
    64,687.20x = 3,248,770,521.02
  5. Step 5: Solve for x
    x = 3,248,770,521.02/64,687.20
  6. Step 6: Final answer
    x = 50,222.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.