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Finding the Fourth Proportional to 64,786.40, 89,407.08 and 36,494.72

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Solution

The fourth proportional to 64,786.40, 89,407.08 and 36,494.72 is: 50,363.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,786.40 : 89,407.08 = 36,494.72 : x
  2. Step 2: Convert to fraction form
    64,786.40/89,407.08 = 36,494.72/x
  3. Step 3: Cross multiply
    64,786.40x = 89,407.08 × 36,494.72
  4. Step 4: Simplify right side
    64,786.40x = 3,262,886,350.62
  5. Step 5: Solve for x
    x = 3,262,886,350.62/64,786.40
  6. Step 6: Final answer
    x = 50,363.75

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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.