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Finding the Fourth Proportional to 78,527.70, 117,791.55 and 77,231.70

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Solution

The fourth proportional to 78,527.70, 117,791.55 and 77,231.70 is: 115,847.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,527.70 : 117,791.55 = 77,231.70 : x
  2. Step 2: Convert to fraction form
    78,527.70/117,791.55 = 77,231.70/x
  3. Step 3: Cross multiply
    78,527.70x = 117,791.55 × 77,231.70
  4. Step 4: Simplify right side
    78,527.70x = 9,097,241,652.14
  5. Step 5: Solve for x
    x = 9,097,241,652.14/78,527.70
  6. Step 6: Final answer
    x = 115,847.55

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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.