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Finding the Fourth Proportional to 114,415.60, 171,634.79 and 42,387.78

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Solution

The fourth proportional to 114,415.60, 171,634.79 and 42,387.78 is: 63,585.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,415.60 : 171,634.79 = 42,387.78 : x
  2. Step 2: Convert to fraction form
    114,415.60/171,634.79 = 42,387.78/x
  3. Step 3: Cross multiply
    114,415.60x = 171,634.79 × 42,387.78
  4. Step 4: Simplify right side
    114,415.60x = 7,275,217,687.70
  5. Step 5: Solve for x
    x = 7,275,217,687.70/114,415.60
  6. Step 6: Final answer
    x = 63,585.89

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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.