Home / 81,387.77-122,111.00-43,397.07

Finding the Fourth Proportional to 81,387.77, 122,111.00 and 43,397.07

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Solution

The fourth proportional to 81,387.77, 122,111.00 and 43,397.07 is: 65,111.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,387.77 : 122,111.00 = 43,397.07 : x
  2. Step 2: Convert to fraction form
    81,387.77/122,111.00 = 43,397.07/x
  3. Step 3: Cross multiply
    81,387.77x = 122,111.00 × 43,397.07
  4. Step 4: Simplify right side
    81,387.77x = 5,299,259,102.61
  5. Step 5: Solve for x
    x = 5,299,259,102.61/81,387.77
  6. Step 6: Final answer
    x = 65,111.25

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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.