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Finding the Fourth Proportional to 65,881.72, 90,916.81 and 35,667.05

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Solution

The fourth proportional to 65,881.72, 90,916.81 and 35,667.05 is: 49,220.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,881.72 : 90,916.81 = 35,667.05 : x
  2. Step 2: Convert to fraction form
    65,881.72/90,916.81 = 35,667.05/x
  3. Step 3: Cross multiply
    65,881.72x = 90,916.81 × 35,667.05
  4. Step 4: Simplify right side
    65,881.72x = 3,242,734,576.39
  5. Step 5: Solve for x
    x = 3,242,734,576.39/65,881.72
  6. Step 6: Final answer
    x = 49,220.55

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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.