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Finding the Fourth Proportional to 57,412.91, 86,120.98 and 15,859.91

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Solution

The fourth proportional to 57,412.91, 86,120.98 and 15,859.91 is: 23,790.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,412.91 : 86,120.98 = 15,859.91 : x
  2. Step 2: Convert to fraction form
    57,412.91/86,120.98 = 15,859.91/x
  3. Step 3: Cross multiply
    57,412.91x = 86,120.98 × 15,859.91
  4. Step 4: Simplify right side
    57,412.91x = 1,365,870,521.66
  5. Step 5: Solve for x
    x = 1,365,870,521.66/57,412.91
  6. Step 6: Final answer
    x = 23,790.31

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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.