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Finding the Fourth Proportional to 142,750.71, 196,987.41 and 79,083.90

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Solution

The fourth proportional to 142,750.71, 196,987.41 and 79,083.90 is: 109,131.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,750.71 : 196,987.41 = 79,083.90 : x
  2. Step 2: Convert to fraction form
    142,750.71/196,987.41 = 79,083.90/x
  3. Step 3: Cross multiply
    142,750.71x = 196,987.41 × 79,083.90
  4. Step 4: Simplify right side
    142,750.71x = 15,578,532,633.70
  5. Step 5: Solve for x
    x = 15,578,532,633.70/142,750.71
  6. Step 6: Final answer
    x = 109,131.03

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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.