Home / 135,139.36-186,491.10-74,711.54

Finding the Fourth Proportional to 135,139.36, 186,491.10 and 74,711.54

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Solution

The fourth proportional to 135,139.36, 186,491.10 and 74,711.54 is: 103,101.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,139.36 : 186,491.10 = 74,711.54 : x
  2. Step 2: Convert to fraction form
    135,139.36/186,491.10 = 74,711.54/x
  3. Step 3: Cross multiply
    135,139.36x = 186,491.10 × 74,711.54
  4. Step 4: Simplify right side
    135,139.36x = 13,933,037,277.29
  5. Step 5: Solve for x
    x = 13,933,037,277.29/135,139.36
  6. Step 6: Final answer
    x = 103,101.25

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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.