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Finding the Fourth Proportional to 143,347.56, 197,802.41 and 78,806.15

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Solution

The fourth proportional to 143,347.56, 197,802.41 and 78,806.15 is: 108,743.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,347.56 : 197,802.41 = 78,806.15 : x
  2. Step 2: Convert to fraction form
    143,347.56/197,802.41 = 78,806.15/x
  3. Step 3: Cross multiply
    143,347.56x = 197,802.41 × 78,806.15
  4. Step 4: Simplify right side
    143,347.56x = 15,588,045,751.54
  5. Step 5: Solve for x
    x = 15,588,045,751.54/143,347.56
  6. Step 6: Final answer
    x = 108,743.02

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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.