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Finding the Fourth Proportional to 77,285.82, 115,587.99 and 67,279.62

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Solution

The fourth proportional to 77,285.82, 115,587.99 and 67,279.62 is: 100,622.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,285.82 : 115,587.99 = 67,279.62 : x
  2. Step 2: Convert to fraction form
    77,285.82/115,587.99 = 67,279.62/x
  3. Step 3: Cross multiply
    77,285.82x = 115,587.99 × 67,279.62
  4. Step 4: Simplify right side
    77,285.82x = 7,776,716,043.76
  5. Step 5: Solve for x
    x = 7,776,716,043.76/77,285.82
  6. Step 6: Final answer
    x = 100,622.81

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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.