Home / 138,162.13-190,663.73-78,546.13

Finding the Fourth Proportional to 138,162.13, 190,663.73 and 78,546.13

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Solution

The fourth proportional to 138,162.13, 190,663.73 and 78,546.13 is: 108,393.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,162.13 : 190,663.73 = 78,546.13 : x
  2. Step 2: Convert to fraction form
    138,162.13/190,663.73 = 78,546.13/x
  3. Step 3: Cross multiply
    138,162.13x = 190,663.73 × 78,546.13
  4. Step 4: Simplify right side
    138,162.13x = 14,975,898,122.86
  5. Step 5: Solve for x
    x = 14,975,898,122.86/138,162.13
  6. Step 6: Final answer
    x = 108,393.65

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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.