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Finding the Fourth Proportional to 142,859.42, 197,146.28 and 79,197.22

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Solution

The fourth proportional to 142,859.42, 197,146.28 and 79,197.22 is: 109,292.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,859.42 : 197,146.28 = 79,197.22 : x
  2. Step 2: Convert to fraction form
    142,859.42/197,146.28 = 79,197.22/x
  3. Step 3: Cross multiply
    142,859.42x = 197,146.28 × 79,197.22
  4. Step 4: Simplify right side
    142,859.42x = 15,613,436,976.55
  5. Step 5: Solve for x
    x = 15,613,436,976.55/142,859.42
  6. Step 6: Final answer
    x = 109,292.32

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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.