Home / 77,331.70-115,997.55-68,518.90

Finding the Fourth Proportional to 77,331.70, 115,997.55 and 68,518.90

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Solution

The fourth proportional to 77,331.70, 115,997.55 and 68,518.90 is: 102,778.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,331.70 : 115,997.55 = 68,518.90 : x
  2. Step 2: Convert to fraction form
    77,331.70/115,997.55 = 68,518.90/x
  3. Step 3: Cross multiply
    77,331.70x = 115,997.55 × 68,518.90
  4. Step 4: Simplify right side
    77,331.70x = 7,948,024,528.70
  5. Step 5: Solve for x
    x = 7,948,024,528.70/77,331.70
  6. Step 6: Final answer
    x = 102,778.35

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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.