Home / 142,131.20-196,150.56-81,721.76

Finding the Fourth Proportional to 142,131.20, 196,150.56 and 81,721.76

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Solution

The fourth proportional to 142,131.20, 196,150.56 and 81,721.76 is: 112,781.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,131.20 : 196,150.56 = 81,721.76 : x
  2. Step 2: Convert to fraction form
    142,131.20/196,150.56 = 81,721.76/x
  3. Step 3: Cross multiply
    142,131.20x = 196,150.56 × 81,721.76
  4. Step 4: Simplify right side
    142,131.20x = 16,029,768,988.19
  5. Step 5: Solve for x
    x = 16,029,768,988.19/142,131.20
  6. Step 6: Final answer
    x = 112,781.49

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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.