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Finding the Fourth Proportional to 55,245.38, 76,236 and 31,368.92

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Solution

The fourth proportional to 55,245.38, 76,236 and 31,368.92 is: 43,287.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,245.38 : 76,236 = 31,368.92 : x
  2. Step 2: Convert to fraction form
    55,245.38/76,236 = 31,368.92/x
  3. Step 3: Cross multiply
    55,245.38x = 76,236 × 31,368.92
  4. Step 4: Simplify right side
    55,245.38x = 2,391,440,985.12
  5. Step 5: Solve for x
    x = 2,391,440,985.12/55,245.38
  6. Step 6: Final answer
    x = 43,287.62

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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.