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Finding the Fourth Proportional to 143,342.40, 197,819.26 and 79,681.26

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Solution

The fourth proportional to 143,342.40, 197,819.26 and 79,681.26 is: 109,963.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,342.40 : 197,819.26 = 79,681.26 : x
  2. Step 2: Convert to fraction form
    143,342.40/197,819.26 = 79,681.26/x
  3. Step 3: Cross multiply
    143,342.40x = 197,819.26 × 79,681.26
  4. Step 4: Simplify right side
    143,342.40x = 15,762,487,889.07
  5. Step 5: Solve for x
    x = 15,762,487,889.07/143,342.40
  6. Step 6: Final answer
    x = 109,963.89

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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.