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Finding the Fourth Proportional to 143,337.71, 197,788.86 and 78,796.31

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Solution

The fourth proportional to 143,337.71, 197,788.86 and 78,796.31 is: 108,729.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,337.71 : 197,788.86 = 78,796.31 : x
  2. Step 2: Convert to fraction form
    143,337.71/197,788.86 = 78,796.31/x
  3. Step 3: Cross multiply
    143,337.71x = 197,788.86 × 78,796.31
  4. Step 4: Simplify right side
    143,337.71x = 15,585,031,338.16
  5. Step 5: Solve for x
    x = 15,585,031,338.16/143,337.71
  6. Step 6: Final answer
    x = 108,729.45

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1.5x scale

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.