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Finding the Fourth Proportional to 87,281.64, 120,448.81 and 49,555.89

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Solution

The fourth proportional to 87,281.64, 120,448.81 and 49,555.89 is: 68,387.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,281.64 : 120,448.81 = 49,555.89 : x
  2. Step 2: Convert to fraction form
    87,281.64/120,448.81 = 49,555.89/x
  3. Step 3: Cross multiply
    87,281.64x = 120,448.81 × 49,555.89
  4. Step 4: Simplify right side
    87,281.64x = 5,968,947,762.18
  5. Step 5: Solve for x
    x = 5,968,947,762.18/87,281.64
  6. Step 6: Final answer
    x = 68,387.21

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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.