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Finding the Fourth Proportional to 143,432.64, 197,932.56 and 78,901.56

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Solution

The fourth proportional to 143,432.64, 197,932.56 and 78,901.56 is: 108,881.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,432.64 : 197,932.56 = 78,901.56 : x
  2. Step 2: Convert to fraction form
    143,432.64/197,932.56 = 78,901.56/x
  3. Step 3: Cross multiply
    143,432.64x = 197,932.56 × 78,901.56
  4. Step 4: Simplify right side
    143,432.64x = 15,617,187,758.79
  5. Step 5: Solve for x
    x = 15,617,187,758.79/143,432.64
  6. Step 6: Final answer
    x = 108,881.69

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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.