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Finding the Fourth Proportional to 135,395.25, 186,851.30 and 74,965.90

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Solution

The fourth proportional to 135,395.25, 186,851.30 and 74,965.90 is: 103,456.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,395.25 : 186,851.30 = 74,965.90 : x
  2. Step 2: Convert to fraction form
    135,395.25/186,851.30 = 74,965.90/x
  3. Step 3: Cross multiply
    135,395.25x = 186,851.30 × 74,965.90
  4. Step 4: Simplify right side
    135,395.25x = 14,007,475,870.67
  5. Step 5: Solve for x
    x = 14,007,475,870.67/135,395.25
  6. Step 6: Final answer
    x = 103,456.18

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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.