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Finding the Fourth Proportional to 135,215.76, 186,611.36 and 74,791.00

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Solution

The fourth proportional to 135,215.76, 186,611.36 and 74,791.00 is: 103,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,215.76 : 186,611.36 = 74,791.00 : x
  2. Step 2: Convert to fraction form
    135,215.76/186,611.36 = 74,791.00/x
  3. Step 3: Cross multiply
    135,215.76x = 186,611.36 × 74,791.00
  4. Step 4: Simplify right side
    135,215.76x = 13,956,849,140.56
  5. Step 5: Solve for x
    x = 13,956,849,140.56/135,215.76
  6. Step 6: Final answer
    x = 103,219.10

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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.