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Finding the Fourth Proportional to 137,361.65, 205,673.33 and 87,170.00

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Solution

The fourth proportional to 137,361.65, 205,673.33 and 87,170.00 is: 130,520.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,361.65 : 205,673.33 = 87,170.00 : x
  2. Step 2: Convert to fraction form
    137,361.65/205,673.33 = 87,170.00/x
  3. Step 3: Cross multiply
    137,361.65x = 205,673.33 × 87,170.00
  4. Step 4: Simplify right side
    137,361.65x = 17,928,543,365.66
  5. Step 5: Solve for x
    x = 17,928,543,365.66/137,361.65
  6. Step 6: Final answer
    x = 130,520.74

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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.