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Finding the Fourth Proportional to 142,705, 196,932.90 and 79,046.90

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Solution

The fourth proportional to 142,705, 196,932.90 and 79,046.90 is: 109,084.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,705 : 196,932.90 = 79,046.90 : x
  2. Step 2: Convert to fraction form
    142,705/196,932.90 = 79,046.90/x
  3. Step 3: Cross multiply
    142,705x = 196,932.90 × 79,046.90
  4. Step 4: Simplify right side
    142,705x = 15,566,935,253.01
  5. Step 5: Solve for x
    x = 15,566,935,253.01/142,705
  6. Step 6: Final answer
    x = 109,084.72

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1.5x scale

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.