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Finding the Fourth Proportional to 121,200.48, 181,674.36 and 71,239.68

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Solution

The fourth proportional to 121,200.48, 181,674.36 and 71,239.68 is: 106,785.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,200.48 : 181,674.36 = 71,239.68 : x
  2. Step 2: Convert to fraction form
    121,200.48/181,674.36 = 71,239.68/x
  3. Step 3: Cross multiply
    121,200.48x = 181,674.36 × 71,239.68
  4. Step 4: Simplify right side
    121,200.48x = 12,942,423,270.60
  5. Step 5: Solve for x
    x = 12,942,423,270.60/121,200.48
  6. Step 6: Final answer
    x = 106,785.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.