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Finding the Fourth Proportional to 104,439.71, 144,129.41 and 56,693.05

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Solution

The fourth proportional to 104,439.71, 144,129.41 and 56,693.05 is: 78,237.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,439.71 : 144,129.41 = 56,693.05 : x
  2. Step 2: Convert to fraction form
    104,439.71/144,129.41 = 56,693.05/x
  3. Step 3: Cross multiply
    104,439.71x = 144,129.41 × 56,693.05
  4. Step 4: Simplify right side
    104,439.71x = 8,171,135,564.14
  5. Step 5: Solve for x
    x = 8,171,135,564.14/104,439.71
  6. Step 6: Final answer
    x = 78,237.83

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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.