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Finding the Fourth Proportional to 90,675.70, 125,129.95 and 50,387.51

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Solution

The fourth proportional to 90,675.70, 125,129.95 and 50,387.51 is: 69,533.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,675.70 : 125,129.95 = 50,387.51 : x
  2. Step 2: Convert to fraction form
    90,675.70/125,129.95 = 50,387.51/x
  3. Step 3: Cross multiply
    90,675.70x = 125,129.95 × 50,387.51
  4. Step 4: Simplify right side
    90,675.70x = 6,304,986,793.78
  5. Step 5: Solve for x
    x = 6,304,986,793.78/90,675.70
  6. Step 6: Final answer
    x = 69,533.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.