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Finding the Fourth Proportional to 143,463.52, 197,978.40 and 79,802.88

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Solution

The fourth proportional to 143,463.52, 197,978.40 and 79,802.88 is: 110,127.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,463.52 : 197,978.40 = 79,802.88 : x
  2. Step 2: Convert to fraction form
    143,463.52/197,978.40 = 79,802.88/x
  3. Step 3: Cross multiply
    143,463.52x = 197,978.40 × 79,802.88
  4. Step 4: Simplify right side
    143,463.52x = 15,799,246,497.79
  5. Step 5: Solve for x
    x = 15,799,246,497.79/143,463.52
  6. Step 6: Final answer
    x = 110,127.27

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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.