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Finding the Fourth Proportional to 135,472.50, 186,945.30 and 74,218.92

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Solution

The fourth proportional to 135,472.50, 186,945.30 and 74,218.92 is: 102,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,472.50 : 186,945.30 = 74,218.92 : x
  2. Step 2: Convert to fraction form
    135,472.50/186,945.30 = 74,218.92/x
  3. Step 3: Cross multiply
    135,472.50x = 186,945.30 × 74,218.92
  4. Step 4: Simplify right side
    135,472.50x = 13,874,878,265.08
  5. Step 5: Solve for x
    x = 13,874,878,265.08/135,472.50
  6. Step 6: Final answer
    x = 102,418.41

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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.