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Finding the Fourth Proportional to 142,690.46, 196,919.06 and 79,028.19

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Solution

The fourth proportional to 142,690.46, 196,919.06 and 79,028.19 is: 109,062.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,690.46 : 196,919.06 = 79,028.19 : x
  2. Step 2: Convert to fraction form
    142,690.46/196,919.06 = 79,028.19/x
  3. Step 3: Cross multiply
    142,690.46x = 196,919.06 × 79,028.19
  4. Step 4: Simplify right side
    142,690.46x = 15,562,156,493.16
  5. Step 5: Solve for x
    x = 15,562,156,493.16/142,690.46
  6. Step 6: Final answer
    x = 109,062.35

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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.