Home / 87,971.85-121,338.95-53,982.09

Finding the Fourth Proportional to 87,971.85, 121,338.95 and 53,982.09

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Solution

The fourth proportional to 87,971.85, 121,338.95 and 53,982.09 is: 74,457.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,971.85 : 121,338.95 = 53,982.09 : x
  2. Step 2: Convert to fraction form
    87,971.85/121,338.95 = 53,982.09/x
  3. Step 3: Cross multiply
    87,971.85x = 121,338.95 × 53,982.09
  4. Step 4: Simplify right side
    87,971.85x = 6,550,129,849.50
  5. Step 5: Solve for x
    x = 6,550,129,849.50/87,971.85
  6. Step 6: Final answer
    x = 74,457.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.