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Finding the Fourth Proportional to 77,061.39, 115,592.09 and 21,657.39

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Solution

The fourth proportional to 77,061.39, 115,592.09 and 21,657.39 is: 32,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,061.39 : 115,592.09 = 21,657.39 : x
  2. Step 2: Convert to fraction form
    77,061.39/115,592.09 = 21,657.39/x
  3. Step 3: Cross multiply
    77,061.39x = 115,592.09 × 21,657.39
  4. Step 4: Simplify right side
    77,061.39x = 2,503,422,974.05
  5. Step 5: Solve for x
    x = 2,503,422,974.05/77,061.39
  6. Step 6: Final answer
    x = 32,486.09

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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.