Home / 135,155.10-186,517.92-74,729.64

Finding the Fourth Proportional to 135,155.10, 186,517.92 and 74,729.64

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Solution

The fourth proportional to 135,155.10, 186,517.92 and 74,729.64 is: 103,129.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,155.10 : 186,517.92 = 74,729.64 : x
  2. Step 2: Convert to fraction form
    135,155.10/186,517.92 = 74,729.64/x
  3. Step 3: Cross multiply
    135,155.10x = 186,517.92 × 74,729.64
  4. Step 4: Simplify right side
    135,155.10x = 13,938,417,015.15
  5. Step 5: Solve for x
    x = 13,938,417,015.15/135,155.10
  6. Step 6: Final answer
    x = 103,129.05

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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.