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Finding the Fourth Proportional to 138,361.80, 207,409.86 and 88,300.56

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Solution

The fourth proportional to 138,361.80, 207,409.86 and 88,300.56 is: 132,366.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,361.80 : 207,409.86 = 88,300.56 : x
  2. Step 2: Convert to fraction form
    138,361.80/207,409.86 = 88,300.56/x
  3. Step 3: Cross multiply
    138,361.80x = 207,409.86 × 88,300.56
  4. Step 4: Simplify right side
    138,361.80x = 18,314,406,787.52
  5. Step 5: Solve for x
    x = 18,314,406,787.52/138,361.80
  6. Step 6: Final answer
    x = 132,366.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.