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Finding the Fourth Proportional to 56,786.90, 85,233.11 and 28,726.79

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Solution

The fourth proportional to 56,786.90, 85,233.11 and 28,726.79 is: 43,116.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,786.90 : 85,233.11 = 28,726.79 : x
  2. Step 2: Convert to fraction form
    56,786.90/85,233.11 = 28,726.79/x
  3. Step 3: Cross multiply
    56,786.90x = 85,233.11 × 28,726.79
  4. Step 4: Simplify right side
    56,786.90x = 2,448,473,082.22
  5. Step 5: Solve for x
    x = 2,448,473,082.22/56,786.90
  6. Step 6: Final answer
    x = 43,116.87

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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.