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Finding the Fourth Proportional to 143,405.42, 197,904.29 and 78,879.62

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Solution

The fourth proportional to 143,405.42, 197,904.29 and 78,879.62 is: 108,856.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,405.42 : 197,904.29 = 78,879.62 : x
  2. Step 2: Convert to fraction form
    143,405.42/197,904.29 = 78,879.62/x
  3. Step 3: Cross multiply
    143,405.42x = 197,904.29 × 78,879.62
  4. Step 4: Simplify right side
    143,405.42x = 15,610,613,807.65
  5. Step 5: Solve for x
    x = 15,610,613,807.65/143,405.42
  6. Step 6: Final answer
    x = 108,856.52

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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.