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Finding the Fourth Proportional to 92,978.84, 128,311.26 and 50,538.20

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Solution

The fourth proportional to 92,978.84, 128,311.26 and 50,538.20 is: 69,742.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.84 : 128,311.26 = 50,538.20 : x
  2. Step 2: Convert to fraction form
    92,978.84/128,311.26 = 50,538.20/x
  3. Step 3: Cross multiply
    92,978.84x = 128,311.26 × 50,538.20
  4. Step 4: Simplify right side
    92,978.84x = 6,484,620,120.13
  5. Step 5: Solve for x
    x = 6,484,620,120.13/92,978.84
  6. Step 6: Final answer
    x = 69,742.97

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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.