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Finding the Fourth Proportional to 85,981.84, 128,856.12 and 48,523.39

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Solution

The fourth proportional to 85,981.84, 128,856.12 and 48,523.39 is: 72,719.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,981.84 : 128,856.12 = 48,523.39 : x
  2. Step 2: Convert to fraction form
    85,981.84/128,856.12 = 48,523.39/x
  3. Step 3: Cross multiply
    85,981.84x = 128,856.12 × 48,523.39
  4. Step 4: Simplify right side
    85,981.84x = 6,252,535,260.54
  5. Step 5: Solve for x
    x = 6,252,535,260.54/85,981.84
  6. Step 6: Final answer
    x = 72,719.26

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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.