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Finding the Fourth Proportional to 64,847.99, 89,531.88 and 40,682.09

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Solution

The fourth proportional to 64,847.99, 89,531.88 and 40,682.09 is: 56,167.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,847.99 : 89,531.88 = 40,682.09 : x
  2. Step 2: Convert to fraction form
    64,847.99/89,531.88 = 40,682.09/x
  3. Step 3: Cross multiply
    64,847.99x = 89,531.88 × 40,682.09
  4. Step 4: Simplify right side
    64,847.99x = 3,642,343,888.11
  5. Step 5: Solve for x
    x = 3,642,343,888.11/64,847.99
  6. Step 6: Final answer
    x = 56,167.41

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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.