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Finding the Fourth Proportional to 92,263.72, 138,395.56 and 66,019.72

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Solution

The fourth proportional to 92,263.72, 138,395.56 and 66,019.72 is: 99,029.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,263.72 : 138,395.56 = 66,019.72 : x
  2. Step 2: Convert to fraction form
    92,263.72/138,395.56 = 66,019.72/x
  3. Step 3: Cross multiply
    92,263.72x = 138,395.56 × 66,019.72
  4. Step 4: Simplify right side
    92,263.72x = 9,136,836,120.44
  5. Step 5: Solve for x
    x = 9,136,836,120.44/92,263.72
  6. Step 6: Final answer
    x = 99,029.57

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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.