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Finding the Fourth Proportional to 58,051.73, 87,116.43 and 21,115.73

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Solution

The fourth proportional to 58,051.73, 87,116.43 and 21,115.73 is: 31,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,051.73 : 87,116.43 = 21,115.73 : x
  2. Step 2: Convert to fraction form
    58,051.73/87,116.43 = 21,115.73/x
  3. Step 3: Cross multiply
    58,051.73x = 87,116.43 × 21,115.73
  4. Step 4: Simplify right side
    58,051.73x = 1,839,527,311.42
  5. Step 5: Solve for x
    x = 1,839,527,311.42/58,051.73
  6. Step 6: Final answer
    x = 31,687.72

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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.