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Finding the Fourth Proportional to 81,305.22, 121,800.02 and 59,919.10

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Solution

The fourth proportional to 81,305.22, 121,800.02 and 59,919.10 is: 89,762.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,305.22 : 121,800.02 = 59,919.10 : x
  2. Step 2: Convert to fraction form
    81,305.22/121,800.02 = 59,919.10/x
  3. Step 3: Cross multiply
    81,305.22x = 121,800.02 × 59,919.10
  4. Step 4: Simplify right side
    81,305.22x = 7,298,147,578.38
  5. Step 5: Solve for x
    x = 7,298,147,578.38/81,305.22
  6. Step 6: Final answer
    x = 89,762.35

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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.