Home / 91,415.23-126,187.60-81,837.79

Finding the Fourth Proportional to 91,415.23, 126,187.60 and 81,837.79

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Solution

The fourth proportional to 91,415.23, 126,187.60 and 81,837.79 is: 112,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,415.23 : 126,187.60 = 81,837.79 : x
  2. Step 2: Convert to fraction form
    91,415.23/126,187.60 = 81,837.79/x
  3. Step 3: Cross multiply
    91,415.23x = 126,187.60 × 81,837.79
  4. Step 4: Simplify right side
    91,415.23x = 10,326,914,309.40
  5. Step 5: Solve for x
    x = 10,326,914,309.40/91,415.23
  6. Step 6: Final answer
    x = 112,967.11

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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.