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Finding the Fourth Proportional to 143,309.87, 197,762.76 and 79,646.30

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Solution

The fourth proportional to 143,309.87, 197,762.76 and 79,646.30 is: 109,909.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,309.87 : 197,762.76 = 79,646.30 : x
  2. Step 2: Convert to fraction form
    143,309.87/197,762.76 = 79,646.30/x
  3. Step 3: Cross multiply
    143,309.87x = 197,762.76 × 79,646.30
  4. Step 4: Simplify right side
    143,309.87x = 15,751,071,122.97
  5. Step 5: Solve for x
    x = 15,751,071,122.97/143,309.87
  6. Step 6: Final answer
    x = 109,909.19

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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.