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Finding the Fourth Proportional to 64,992.68, 89,663.16 and 43,778.78

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Solution

The fourth proportional to 64,992.68, 89,663.16 and 43,778.78 is: 60,396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,992.68 : 89,663.16 = 43,778.78 : x
  2. Step 2: Convert to fraction form
    64,992.68/89,663.16 = 43,778.78/x
  3. Step 3: Cross multiply
    64,992.68x = 89,663.16 × 43,778.78
  4. Step 4: Simplify right side
    64,992.68x = 3,925,343,755.74
  5. Step 5: Solve for x
    x = 3,925,343,755.74/64,992.68
  6. Step 6: Final answer
    x = 60,396.71

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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.