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Finding the Fourth Proportional to 143,400.72, 197,891.52 and 79,737.84

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Solution

The fourth proportional to 143,400.72, 197,891.52 and 79,737.84 is: 110,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,400.72 : 197,891.52 = 79,737.84 : x
  2. Step 2: Convert to fraction form
    143,400.72/197,891.52 = 79,737.84/x
  3. Step 3: Cross multiply
    143,400.72x = 197,891.52 × 79,737.84
  4. Step 4: Simplify right side
    143,400.72x = 15,779,442,359.12
  5. Step 5: Solve for x
    x = 15,779,442,359.12/143,400.72
  6. Step 6: Final answer
    x = 110,037.40

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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.