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Finding the Fourth Proportional to 81,363.80, 121,808.10 and 58,035.80

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Solution

The fourth proportional to 81,363.80, 121,808.10 and 58,035.80 is: 86,884.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,363.80 : 121,808.10 = 58,035.80 : x
  2. Step 2: Convert to fraction form
    81,363.80/121,808.10 = 58,035.80/x
  3. Step 3: Cross multiply
    81,363.80x = 121,808.10 × 58,035.80
  4. Step 4: Simplify right side
    81,363.80x = 7,069,230,529.98
  5. Step 5: Solve for x
    x = 7,069,230,529.98/81,363.80
  6. Step 6: Final answer
    x = 86,884.22

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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.