Home / 135,142.11-186,495.07-74,715.30

Finding the Fourth Proportional to 135,142.11, 186,495.07 and 74,715.30

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Solution

The fourth proportional to 135,142.11, 186,495.07 and 74,715.30 is: 103,106.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,142.11 : 186,495.07 = 74,715.30 : x
  2. Step 2: Convert to fraction form
    135,142.11/186,495.07 = 74,715.30/x
  3. Step 3: Cross multiply
    135,142.11x = 186,495.07 × 74,715.30
  4. Step 4: Simplify right side
    135,142.11x = 13,934,035,103.57
  5. Step 5: Solve for x
    x = 13,934,035,103.57/135,142.11
  6. Step 6: Final answer
    x = 103,106.54

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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.