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Finding the Fourth Proportional to 64,791.61, 89,415.42 and 36,113.15

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Solution

The fourth proportional to 64,791.61, 89,415.42 and 36,113.15 is: 49,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,791.61 : 89,415.42 = 36,113.15 : x
  2. Step 2: Convert to fraction form
    64,791.61/89,415.42 = 36,113.15/x
  3. Step 3: Cross multiply
    64,791.61x = 89,415.42 × 36,113.15
  4. Step 4: Simplify right side
    64,791.61x = 3,229,072,474.77
  5. Step 5: Solve for x
    x = 3,229,072,474.77/64,791.61
  6. Step 6: Final answer
    x = 49,837.82

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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.