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Finding the Fourth Proportional to 170,662.40, 255,785.96 and 120,756.88

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Solution

The fourth proportional to 170,662.40, 255,785.96 and 120,756.88 is: 180,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,662.40 : 255,785.96 = 120,756.88 : x
  2. Step 2: Convert to fraction form
    170,662.40/255,785.96 = 120,756.88/x
  3. Step 3: Cross multiply
    170,662.40x = 255,785.96 × 120,756.88
  4. Step 4: Simplify right side
    170,662.40x = 30,887,914,477.40
  5. Step 5: Solve for x
    x = 30,887,914,477.40/170,662.40
  6. Step 6: Final answer
    x = 180,988.40

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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.