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Finding the Fourth Proportional to 142,861.80, 197,156.04 and 79,201.08

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Solution

The fourth proportional to 142,861.80, 197,156.04 and 79,201.08 is: 109,301.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,861.80 : 197,156.04 = 79,201.08 : x
  2. Step 2: Convert to fraction form
    142,861.80/197,156.04 = 79,201.08/x
  3. Step 3: Cross multiply
    142,861.80x = 197,156.04 × 79,201.08
  4. Step 4: Simplify right side
    142,861.80x = 15,614,971,296.52
  5. Step 5: Solve for x
    x = 15,614,971,296.52/142,861.80
  6. Step 6: Final answer
    x = 109,301.24

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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.