Home / 87,426.72-120,698.64-57,705.12

Finding the Fourth Proportional to 87,426.72, 120,698.64 and 57,705.12

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Solution

The fourth proportional to 87,426.72, 120,698.64 and 57,705.12 is: 79,665.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,426.72 : 120,698.64 = 57,705.12 : x
  2. Step 2: Convert to fraction form
    87,426.72/120,698.64 = 57,705.12/x
  3. Step 3: Cross multiply
    87,426.72x = 120,698.64 × 57,705.12
  4. Step 4: Simplify right side
    87,426.72x = 6,964,929,505.04
  5. Step 5: Solve for x
    x = 6,964,929,505.04/87,426.72
  6. Step 6: Final answer
    x = 79,665.91

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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.