Home / 138,162.25-190,663.91-78,546.25

Finding the Fourth Proportional to 138,162.25, 190,663.91 and 78,546.25

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Solution

The fourth proportional to 138,162.25, 190,663.91 and 78,546.25 is: 108,393.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,162.25 : 190,663.91 = 78,546.25 : x
  2. Step 2: Convert to fraction form
    138,162.25/190,663.91 = 78,546.25/x
  3. Step 3: Cross multiply
    138,162.25x = 190,663.91 × 78,546.25
  4. Step 4: Simplify right side
    138,162.25x = 14,975,935,140.84
  5. Step 5: Solve for x
    x = 14,975,935,140.84/138,162.25
  6. Step 6: Final answer
    x = 108,393.83

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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.