Home / 80,938.39-111,440.81-68,815.03

Finding the Fourth Proportional to 80,938.39, 111,440.81 and 68,815.03

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Solution

The fourth proportional to 80,938.39, 111,440.81 and 68,815.03 is: 94,748.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,938.39 : 111,440.81 = 68,815.03 : x
  2. Step 2: Convert to fraction form
    80,938.39/111,440.81 = 68,815.03/x
  3. Step 3: Cross multiply
    80,938.39x = 111,440.81 × 68,815.03
  4. Step 4: Simplify right side
    80,938.39x = 7,668,802,060.70
  5. Step 5: Solve for x
    x = 7,668,802,060.70/80,938.39
  6. Step 6: Final answer
    x = 94,748.64

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1.5x scale

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.