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Finding the Fourth Proportional to 81,053.90, 121,552.05 and 36,701.90

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Solution

The fourth proportional to 81,053.90, 121,552.05 and 36,701.90 is: 55,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,053.90 : 121,552.05 = 36,701.90 : x
  2. Step 2: Convert to fraction form
    81,053.90/121,552.05 = 36,701.90/x
  3. Step 3: Cross multiply
    81,053.90x = 121,552.05 × 36,701.90
  4. Step 4: Simplify right side
    81,053.90x = 4,461,191,183.90
  5. Step 5: Solve for x
    x = 4,461,191,183.90/81,053.90
  6. Step 6: Final answer
    x = 55,039.81

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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.