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Finding the Fourth Proportional to 92,160.74, 138,240.98 and 28,986.41

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Solution

The fourth proportional to 92,160.74, 138,240.98 and 28,986.41 is: 43,479.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,160.74 : 138,240.98 = 28,986.41 : x
  2. Step 2: Convert to fraction form
    92,160.74/138,240.98 = 28,986.41/x
  3. Step 3: Cross multiply
    92,160.74x = 138,240.98 × 28,986.41
  4. Step 4: Simplify right side
    92,160.74x = 4,007,109,256.85
  5. Step 5: Solve for x
    x = 4,007,109,256.85/92,160.74
  6. Step 6: Final answer
    x = 43,479.57

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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.