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Finding the Fourth Proportional to 64,545.34, 89,062.11 and 40,343.44

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Solution

The fourth proportional to 64,545.34, 89,062.11 and 40,343.44 is: 55,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,545.34 : 89,062.11 = 40,343.44 : x
  2. Step 2: Convert to fraction form
    64,545.34/89,062.11 = 40,343.44/x
  3. Step 3: Cross multiply
    64,545.34x = 89,062.11 × 40,343.44
  4. Step 4: Simplify right side
    64,545.34x = 3,593,071,891.06
  5. Step 5: Solve for x
    x = 3,593,071,891.06/64,545.34
  6. Step 6: Final answer
    x = 55,667.41

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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.