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Finding the Fourth Proportional to 64,840.40, 89,481.48 and 36,544.40

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Solution

The fourth proportional to 64,840.40, 89,481.48 and 36,544.40 is: 50,432.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,840.40 : 89,481.48 = 36,544.40 : x
  2. Step 2: Convert to fraction form
    64,840.40/89,481.48 = 36,544.40/x
  3. Step 3: Cross multiply
    64,840.40x = 89,481.48 × 36,544.40
  4. Step 4: Simplify right side
    64,840.40x = 3,270,046,997.71
  5. Step 5: Solve for x
    x = 3,270,046,997.71/64,840.40
  6. Step 6: Final answer
    x = 50,432.25

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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.