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Finding the Fourth Proportional to 143,166.78, 197,567.10 and 79,503.48

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Solution

The fourth proportional to 143,166.78, 197,567.10 and 79,503.48 is: 109,713.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,166.78 : 197,567.10 = 79,503.48 : x
  2. Step 2: Convert to fraction form
    143,166.78/197,567.10 = 79,503.48/x
  3. Step 3: Cross multiply
    143,166.78x = 197,567.10 × 79,503.48
  4. Step 4: Simplify right side
    143,166.78x = 15,707,271,983.51
  5. Step 5: Solve for x
    x = 15,707,271,983.51/143,166.78
  6. Step 6: Final answer
    x = 109,713.11

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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.