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Finding the Fourth Proportional to 85,800.48, 128,695.59 and 50,961.84

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Solution

The fourth proportional to 85,800.48, 128,695.59 and 50,961.84 is: 76,439.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800.48 : 128,695.59 = 50,961.84 : x
  2. Step 2: Convert to fraction form
    85,800.48/128,695.59 = 50,961.84/x
  3. Step 3: Cross multiply
    85,800.48x = 128,695.59 × 50,961.84
  4. Step 4: Simplify right side
    85,800.48x = 6,558,564,066.29
  5. Step 5: Solve for x
    x = 6,558,564,066.29/85,800.48
  6. Step 6: Final answer
    x = 76,439.71

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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.