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Finding the Fourth Proportional to 92,117.70, 138,176.55 and 81,231.30

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Solution

The fourth proportional to 92,117.70, 138,176.55 and 81,231.30 is: 121,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,117.70 : 138,176.55 = 81,231.30 : x
  2. Step 2: Convert to fraction form
    92,117.70/138,176.55 = 81,231.30/x
  3. Step 3: Cross multiply
    92,117.70x = 138,176.55 × 81,231.30
  4. Step 4: Simplify right side
    92,117.70x = 11,224,260,786.02
  5. Step 5: Solve for x
    x = 11,224,260,786.02/92,117.70
  6. Step 6: Final answer
    x = 121,846.95

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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.