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Finding the Fourth Proportional to 92,961.54, 128,287.80 and 55,228.50

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Solution

The fourth proportional to 92,961.54, 128,287.80 and 55,228.50 is: 76,215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,961.54 : 128,287.80 = 55,228.50 : x
  2. Step 2: Convert to fraction form
    92,961.54/128,287.80 = 55,228.50/x
  3. Step 3: Cross multiply
    92,961.54x = 128,287.80 × 55,228.50
  4. Step 4: Simplify right side
    92,961.54x = 7,085,142,762.30
  5. Step 5: Solve for x
    x = 7,085,142,762.30/92,961.54
  6. Step 6: Final answer
    x = 76,215.85

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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.