Home / 135,121.18-186,464.25-74,689.50

Finding the Fourth Proportional to 135,121.18, 186,464.25 and 74,689.50

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Solution

The fourth proportional to 135,121.18, 186,464.25 and 74,689.50 is: 103,069.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,121.18 : 186,464.25 = 74,689.50 : x
  2. Step 2: Convert to fraction form
    135,121.18/186,464.25 = 74,689.50/x
  3. Step 3: Cross multiply
    135,121.18x = 186,464.25 × 74,689.50
  4. Step 4: Simplify right side
    135,121.18x = 13,926,921,600.38
  5. Step 5: Solve for x
    x = 13,926,921,600.38/135,121.18
  6. Step 6: Final answer
    x = 103,069.86

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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.