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Finding the Fourth Proportional to 92,617.40, 138,731.70 and 51,015.80

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Solution

The fourth proportional to 92,617.40, 138,731.70 and 51,015.80 is: 76,416.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,617.40 : 138,731.70 = 51,015.80 : x
  2. Step 2: Convert to fraction form
    92,617.40/138,731.70 = 51,015.80/x
  3. Step 3: Cross multiply
    92,617.40x = 138,731.70 × 51,015.80
  4. Step 4: Simplify right side
    92,617.40x = 7,077,508,660.86
  5. Step 5: Solve for x
    x = 7,077,508,660.86/92,617.40
  6. Step 6: Final answer
    x = 76,416.62

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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.