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Finding the Fourth Proportional to 64,843.68, 89,424.72 and 40,928.88

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Solution

The fourth proportional to 64,843.68, 89,424.72 and 40,928.88 is: 56,444.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,843.68 : 89,424.72 = 40,928.88 : x
  2. Step 2: Convert to fraction form
    64,843.68/89,424.72 = 40,928.88/x
  3. Step 3: Cross multiply
    64,843.68x = 89,424.72 × 40,928.88
  4. Step 4: Simplify right side
    64,843.68x = 3,660,053,633.91
  5. Step 5: Solve for x
    x = 3,660,053,633.91/64,843.68
  6. Step 6: Final answer
    x = 56,444.26

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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.