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Finding the Fourth Proportional to 142,808.64, 197,068.80 and 79,145.88

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Solution

The fourth proportional to 142,808.64, 197,068.80 and 79,145.88 is: 109,217.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,808.64 : 197,068.80 = 79,145.88 : x
  2. Step 2: Convert to fraction form
    142,808.64/197,068.80 = 79,145.88/x
  3. Step 3: Cross multiply
    142,808.64x = 197,068.80 × 79,145.88
  4. Step 4: Simplify right side
    142,808.64x = 15,597,183,596.54
  5. Step 5: Solve for x
    x = 15,597,183,596.54/142,808.64
  6. Step 6: Final answer
    x = 109,217.37

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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.