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Finding the Fourth Proportional to 51,381.68, 77,083.06 and 19,791.68

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Solution

The fourth proportional to 51,381.68, 77,083.06 and 19,791.68 is: 29,691.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,381.68 : 77,083.06 = 19,791.68 : x
  2. Step 2: Convert to fraction form
    51,381.68/77,083.06 = 19,791.68/x
  3. Step 3: Cross multiply
    51,381.68x = 77,083.06 × 19,791.68
  4. Step 4: Simplify right side
    51,381.68x = 1,525,603,256.94
  5. Step 5: Solve for x
    x = 1,525,603,256.94/51,381.68
  6. Step 6: Final answer
    x = 29,691.58

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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.