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Finding the Fourth Proportional to 65,289.78, 89,960.13 and 44,031.78

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Solution

The fourth proportional to 65,289.78, 89,960.13 and 44,031.78 is: 60,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,289.78 : 89,960.13 = 44,031.78 : x
  2. Step 2: Convert to fraction form
    65,289.78/89,960.13 = 44,031.78/x
  3. Step 3: Cross multiply
    65,289.78x = 89,960.13 × 44,031.78
  4. Step 4: Simplify right side
    65,289.78x = 3,961,104,652.93
  5. Step 5: Solve for x
    x = 3,961,104,652.93/65,289.78
  6. Step 6: Final answer
    x = 60,669.60

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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.