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Finding the Fourth Proportional to 56,788.77, 85,235.91 and 28,728.66

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Solution

The fourth proportional to 56,788.77, 85,235.91 and 28,728.66 is: 43,119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,788.77 : 85,235.91 = 28,728.66 : x
  2. Step 2: Convert to fraction form
    56,788.77/85,235.91 = 28,728.66/x
  3. Step 3: Cross multiply
    56,788.77x = 85,235.91 × 28,728.66
  4. Step 4: Simplify right side
    56,788.77x = 2,448,713,478.18
  5. Step 5: Solve for x
    x = 2,448,713,478.18/56,788.77
  6. Step 6: Final answer
    x = 43,119.68

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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.