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Finding the Fourth Proportional to 68,988, 95,203.56 and 39,180

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Solution

The fourth proportional to 68,988, 95,203.56 and 39,180 is: 54,068.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,988 : 95,203.56 = 39,180 : x
  2. Step 2: Convert to fraction form
    68,988/95,203.56 = 39,180/x
  3. Step 3: Cross multiply
    68,988x = 95,203.56 × 39,180
  4. Step 4: Simplify right side
    68,988x = 3,730,075,480.80
  5. Step 5: Solve for x
    x = 3,730,075,480.80/68,988
  6. Step 6: Final answer
    x = 54,068.47

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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.