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Finding the Fourth Proportional to 58,278.55, 87,396.39 and 20,828.50

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Solution

The fourth proportional to 58,278.55, 87,396.39 and 20,828.50 is: 31,235.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,278.55 : 87,396.39 = 20,828.50 : x
  2. Step 2: Convert to fraction form
    58,278.55/87,396.39 = 20,828.50/x
  3. Step 3: Cross multiply
    58,278.55x = 87,396.39 × 20,828.50
  4. Step 4: Simplify right side
    58,278.55x = 1,820,335,709.12
  5. Step 5: Solve for x
    x = 1,820,335,709.12/58,278.55
  6. Step 6: Final answer
    x = 31,235.09

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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.