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Finding the Fourth Proportional to 76,791.70, 115,187.55 and 70,830.10

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Solution

The fourth proportional to 76,791.70, 115,187.55 and 70,830.10 is: 106,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,791.70 : 115,187.55 = 70,830.10 : x
  2. Step 2: Convert to fraction form
    76,791.70/115,187.55 = 70,830.10/x
  3. Step 3: Cross multiply
    76,791.70x = 115,187.55 × 70,830.10
  4. Step 4: Simplify right side
    76,791.70x = 8,158,745,685.26
  5. Step 5: Solve for x
    x = 8,158,745,685.26/76,791.70
  6. Step 6: Final answer
    x = 106,245.15

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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.