Home / 78,200.20-117,019.97-67,706.40

Finding the Fourth Proportional to 78,200.20, 117,019.97 and 67,706.40

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Solution

The fourth proportional to 78,200.20, 117,019.97 and 67,706.40 is: 101,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,200.20 : 117,019.97 = 67,706.40 : x
  2. Step 2: Convert to fraction form
    78,200.20/117,019.97 = 67,706.40/x
  3. Step 3: Cross multiply
    78,200.20x = 117,019.97 × 67,706.40
  4. Step 4: Simplify right side
    78,200.20x = 7,923,001,066.07
  5. Step 5: Solve for x
    x = 7,923,001,066.07/78,200.20
  6. Step 6: Final answer
    x = 101,316.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.