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Finding the Fourth Proportional to 142,712.76, 196,943.76 and 79,049.22

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Solution

The fourth proportional to 142,712.76, 196,943.76 and 79,049.22 is: 109,088.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,712.76 : 196,943.76 = 79,049.22 : x
  2. Step 2: Convert to fraction form
    142,712.76/196,943.76 = 79,049.22/x
  3. Step 3: Cross multiply
    142,712.76x = 196,943.76 × 79,049.22
  4. Step 4: Simplify right side
    142,712.76x = 15,568,250,611.87
  5. Step 5: Solve for x
    x = 15,568,250,611.87/142,712.76
  6. Step 6: Final answer
    x = 109,088.01

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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.