Home / 135,330.90-186,772.68-78,742.14

Finding the Fourth Proportional to 135,330.90, 186,772.68 and 78,742.14

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Solution

The fourth proportional to 135,330.90, 186,772.68 and 78,742.14 is: 108,673.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,330.90 : 186,772.68 = 78,742.14 : x
  2. Step 2: Convert to fraction form
    135,330.90/186,772.68 = 78,742.14/x
  3. Step 3: Cross multiply
    135,330.90x = 186,772.68 × 78,742.14
  4. Step 4: Simplify right side
    135,330.90x = 14,706,880,516.74
  5. Step 5: Solve for x
    x = 14,706,880,516.74/135,330.90
  6. Step 6: Final answer
    x = 108,673.48

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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.