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Finding the Fourth Proportional to 143,239.92, 197,671.32 and 79,578.24

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Solution

The fourth proportional to 143,239.92, 197,671.32 and 79,578.24 is: 109,818.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,239.92 : 197,671.32 = 79,578.24 : x
  2. Step 2: Convert to fraction form
    143,239.92/197,671.32 = 79,578.24/x
  3. Step 3: Cross multiply
    143,239.92x = 197,671.32 × 79,578.24
  4. Step 4: Simplify right side
    143,239.92x = 15,730,335,744.08
  5. Step 5: Solve for x
    x = 15,730,335,744.08/143,239.92
  6. Step 6: Final answer
    x = 109,818.10

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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.