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Finding the Fourth Proportional to 92,856.62, 128,142.66 and 54,617.76

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Solution

The fourth proportional to 92,856.62, 128,142.66 and 54,617.76 is: 75,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,856.62 : 128,142.66 = 54,617.76 : x
  2. Step 2: Convert to fraction form
    92,856.62/128,142.66 = 54,617.76/x
  3. Step 3: Cross multiply
    92,856.62x = 128,142.66 × 54,617.76
  4. Step 4: Simplify right side
    92,856.62x = 6,998,865,049.64
  5. Step 5: Solve for x
    x = 6,998,865,049.64/92,856.62
  6. Step 6: Final answer
    x = 75,372.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.