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Finding the Fourth Proportional to 170,411.80, 255,615.30 and 76,917.40

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Solution

The fourth proportional to 170,411.80, 255,615.30 and 76,917.40 is: 115,375.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,411.80 : 255,615.30 = 76,917.40 : x
  2. Step 2: Convert to fraction form
    170,411.80/255,615.30 = 76,917.40/x
  3. Step 3: Cross multiply
    170,411.80x = 255,615.30 × 76,917.40
  4. Step 4: Simplify right side
    170,411.80x = 19,661,264,276.22
  5. Step 5: Solve for x
    x = 19,661,264,276.22/170,411.80
  6. Step 6: Final answer
    x = 115,375.02

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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.