Home / 80,804.28-121,204.10-21,639.98

Finding the Fourth Proportional to 80,804.28, 121,204.10 and 21,639.98

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Solution

The fourth proportional to 80,804.28, 121,204.10 and 21,639.98 is: 32,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,804.28 : 121,204.10 = 21,639.98 : x
  2. Step 2: Convert to fraction form
    80,804.28/121,204.10 = 21,639.98/x
  3. Step 3: Cross multiply
    80,804.28x = 121,204.10 × 21,639.98
  4. Step 4: Simplify right side
    80,804.28x = 2,622,854,299.92
  5. Step 5: Solve for x
    x = 2,622,854,299.92/80,804.28
  6. Step 6: Final answer
    x = 32,459.35

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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.