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Finding the Fourth Proportional to 64,988.78, 89,690.01 and 36,699.62

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Solution

The fourth proportional to 64,988.78, 89,690.01 and 36,699.62 is: 50,648.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,988.78 : 89,690.01 = 36,699.62 : x
  2. Step 2: Convert to fraction form
    64,988.78/89,690.01 = 36,699.62/x
  3. Step 3: Cross multiply
    64,988.78x = 89,690.01 × 36,699.62
  4. Step 4: Simplify right side
    64,988.78x = 3,291,589,284.80
  5. Step 5: Solve for x
    x = 3,291,589,284.80/64,988.78
  6. Step 6: Final answer
    x = 50,648.58

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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.