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Finding the Fourth Proportional to 121,080.52, 181,370.64 and 71,009.84

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Solution

The fourth proportional to 121,080.52, 181,370.64 and 71,009.84 is: 106,368.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,080.52 : 181,370.64 = 71,009.84 : x
  2. Step 2: Convert to fraction form
    121,080.52/181,370.64 = 71,009.84/x
  3. Step 3: Cross multiply
    121,080.52x = 181,370.64 × 71,009.84
  4. Step 4: Simplify right side
    121,080.52x = 12,879,100,336.71
  5. Step 5: Solve for x
    x = 12,879,100,336.71/121,080.52
  6. Step 6: Final answer
    x = 106,368.06

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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.