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Finding the Fourth Proportional to 92,142.94, 138,150.28 and 40,823.74

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Solution

The fourth proportional to 92,142.94, 138,150.28 and 40,823.74 is: 61,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,142.94 : 138,150.28 = 40,823.74 : x
  2. Step 2: Convert to fraction form
    92,142.94/138,150.28 = 40,823.74/x
  3. Step 3: Cross multiply
    92,142.94x = 138,150.28 × 40,823.74
  4. Step 4: Simplify right side
    92,142.94x = 5,639,811,111.65
  5. Step 5: Solve for x
    x = 5,639,811,111.65/92,142.94
  6. Step 6: Final answer
    x = 61,207.20

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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.