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Finding the Fourth Proportional to 143,343, 197,803.98 and 79,678.44

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Solution

The fourth proportional to 143,343, 197,803.98 and 79,678.44 is: 109,951.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,343 : 197,803.98 = 79,678.44 : x
  2. Step 2: Convert to fraction form
    143,343/197,803.98 = 79,678.44/x
  3. Step 3: Cross multiply
    143,343x = 197,803.98 × 79,678.44
  4. Step 4: Simplify right side
    143,343x = 15,760,712,552.19
  5. Step 5: Solve for x
    x = 15,760,712,552.19/143,343
  6. Step 6: Final answer
    x = 109,951.04

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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.