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Finding the Fourth Proportional to 90,051.92, 134,991.28 and 60,478

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Solution

The fourth proportional to 90,051.92, 134,991.28 and 60,478 is: 90,658.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,051.92 : 134,991.28 = 60,478 : x
  2. Step 2: Convert to fraction form
    90,051.92/134,991.28 = 60,478/x
  3. Step 3: Cross multiply
    90,051.92x = 134,991.28 × 60,478
  4. Step 4: Simplify right side
    90,051.92x = 8,164,002,631.84
  5. Step 5: Solve for x
    x = 8,164,002,631.84/90,051.92
  6. Step 6: Final answer
    x = 90,658.84

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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.