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Finding the Fourth Proportional to 114,291.20, 171,145.20 and 90,963.20

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Solution

The fourth proportional to 114,291.20, 171,145.20 and 90,963.20 is: 136,212.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,291.20 : 171,145.20 = 90,963.20 : x
  2. Step 2: Convert to fraction form
    114,291.20/171,145.20 = 90,963.20/x
  3. Step 3: Cross multiply
    114,291.20x = 171,145.20 × 90,963.20
  4. Step 4: Simplify right side
    114,291.20x = 15,567,915,056.64
  5. Step 5: Solve for x
    x = 15,567,915,056.64/114,291.20
  6. Step 6: Final answer
    x = 136,212.72

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1.5x scale

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.