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Finding the Fourth Proportional to 121,574.28, 167,800.50 and 71,289.48

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Solution

The fourth proportional to 121,574.28, 167,800.50 and 71,289.48 is: 98,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,574.28 : 167,800.50 = 71,289.48 : x
  2. Step 2: Convert to fraction form
    121,574.28/167,800.50 = 71,289.48/x
  3. Step 3: Cross multiply
    121,574.28x = 167,800.50 × 71,289.48
  4. Step 4: Simplify right side
    121,574.28x = 11,962,410,388.74
  5. Step 5: Solve for x
    x = 11,962,410,388.74/121,574.28
  6. Step 6: Final answer
    x = 98,395.90

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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.