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Finding the Fourth Proportional to 142,951.96, 197,256.78 and 79,274.20

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Solution

The fourth proportional to 142,951.96, 197,256.78 and 79,274.20 is: 109,389.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,951.96 : 197,256.78 = 79,274.20 : x
  2. Step 2: Convert to fraction form
    142,951.96/197,256.78 = 79,274.20/x
  3. Step 3: Cross multiply
    142,951.96x = 197,256.78 × 79,274.20
  4. Step 4: Simplify right side
    142,951.96x = 15,637,373,429.08
  5. Step 5: Solve for x
    x = 15,637,373,429.08/142,951.96
  6. Step 6: Final answer
    x = 109,389.01

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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.