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Finding the Fourth Proportional to 77,809.47, 107,379.17 and 43,819.17

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Solution

The fourth proportional to 77,809.47, 107,379.17 and 43,819.17 is: 60,471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,809.47 : 107,379.17 = 43,819.17 : x
  2. Step 2: Convert to fraction form
    77,809.47/107,379.17 = 43,819.17/x
  3. Step 3: Cross multiply
    77,809.47x = 107,379.17 × 43,819.17
  4. Step 4: Simplify right side
    77,809.47x = 4,705,266,104.69
  5. Step 5: Solve for x
    x = 4,705,266,104.69/77,809.47
  6. Step 6: Final answer
    x = 60,471.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.