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Finding the Fourth Proportional to 80,765.77, 121,148.63 and 21,599.91

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Solution

The fourth proportional to 80,765.77, 121,148.63 and 21,599.91 is: 32,399.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765.77 : 121,148.63 = 21,599.91 : x
  2. Step 2: Convert to fraction form
    80,765.77/121,148.63 = 21,599.91/x
  3. Step 3: Cross multiply
    80,765.77x = 121,148.63 × 21,599.91
  4. Step 4: Simplify right side
    80,765.77x = 2,616,799,050.32
  5. Step 5: Solve for x
    x = 2,616,799,050.32/80,765.77
  6. Step 6: Final answer
    x = 32,399.85

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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.