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Finding the Fourth Proportional to 64,989.56, 89,687.23 and 36,695.45

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Solution

The fourth proportional to 64,989.56, 89,687.23 and 36,695.45 is: 50,640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,989.56 : 89,687.23 = 36,695.45 : x
  2. Step 2: Convert to fraction form
    64,989.56/89,687.23 = 36,695.45/x
  3. Step 3: Cross multiply
    64,989.56x = 89,687.23 × 36,695.45
  4. Step 4: Simplify right side
    64,989.56x = 3,291,113,396.58
  5. Step 5: Solve for x
    x = 3,291,113,396.58/64,989.56
  6. Step 6: Final answer
    x = 50,640.65

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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.