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Finding the Fourth Proportional to 86,206.55, 118,963.89 and 48,480.80

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Solution

The fourth proportional to 86,206.55, 118,963.89 and 48,480.80 is: 66,902.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,206.55 : 118,963.89 = 48,480.80 : x
  2. Step 2: Convert to fraction form
    86,206.55/118,963.89 = 48,480.80/x
  3. Step 3: Cross multiply
    86,206.55x = 118,963.89 × 48,480.80
  4. Step 4: Simplify right side
    86,206.55x = 5,767,463,963.49
  5. Step 5: Solve for x
    x = 5,767,463,963.49/86,206.55
  6. Step 6: Final answer
    x = 66,902.85

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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.