Home / 142,357.91-196,444.53-81,918.79

Finding the Fourth Proportional to 142,357.91, 196,444.53 and 81,918.79

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Solution

The fourth proportional to 142,357.91, 196,444.53 and 81,918.79 is: 113,042.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,357.91 : 196,444.53 = 81,918.79 : x
  2. Step 2: Convert to fraction form
    142,357.91/196,444.53 = 81,918.79/x
  3. Step 3: Cross multiply
    142,357.91x = 196,444.53 × 81,918.79
  4. Step 4: Simplify right side
    142,357.91x = 16,092,497,708.61
  5. Step 5: Solve for x
    x = 16,092,497,708.61/142,357.91
  6. Step 6: Final answer
    x = 113,042.53

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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.