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Finding the Fourth Proportional to 64,976.40, 89,672.52 and 36,685.20

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Solution

The fourth proportional to 64,976.40, 89,672.52 and 36,685.20 is: 50,628.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,976.40 : 89,672.52 = 36,685.20 : x
  2. Step 2: Convert to fraction form
    64,976.40/89,672.52 = 36,685.20/x
  3. Step 3: Cross multiply
    64,976.40x = 89,672.52 × 36,685.20
  4. Step 4: Simplify right side
    64,976.40x = 3,289,654,330.70
  5. Step 5: Solve for x
    x = 3,289,654,330.70/64,976.40
  6. Step 6: Final answer
    x = 50,628.45

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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.