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Finding the Fourth Proportional to 64,985.82, 89,682.15 and 36,691.74

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Solution

The fourth proportional to 64,985.82, 89,682.15 and 36,691.74 is: 50,635.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,985.82 : 89,682.15 = 36,691.74 : x
  2. Step 2: Convert to fraction form
    64,985.82/89,682.15 = 36,691.74/x
  3. Step 3: Cross multiply
    64,985.82x = 89,682.15 × 36,691.74
  4. Step 4: Simplify right side
    64,985.82x = 3,290,594,130.44
  5. Step 5: Solve for x
    x = 3,290,594,130.44/64,985.82
  6. Step 6: Final answer
    x = 50,635.57

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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.