Home / 99,660.95-137,533.19-54,338.57

Finding the Fourth Proportional to 99,660.95, 137,533.19 and 54,338.57

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Solution

The fourth proportional to 99,660.95, 137,533.19 and 54,338.57 is: 74,987.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660.95 : 137,533.19 = 54,338.57 : x
  2. Step 2: Convert to fraction form
    99,660.95/137,533.19 = 54,338.57/x
  3. Step 3: Cross multiply
    99,660.95x = 137,533.19 × 54,338.57
  4. Step 4: Simplify right side
    99,660.95x = 7,473,355,912.78
  5. Step 5: Solve for x
    x = 7,473,355,912.78/99,660.95
  6. Step 6: Final answer
    x = 74,987.81

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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.