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Finding the Fourth Proportional to 53,427.80, 80,148.90 and 18,378.20

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Solution

The fourth proportional to 53,427.80, 80,148.90 and 18,378.20 is: 27,569.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,427.80 : 80,148.90 = 18,378.20 : x
  2. Step 2: Convert to fraction form
    53,427.80/80,148.90 = 18,378.20/x
  3. Step 3: Cross multiply
    53,427.80x = 80,148.90 × 18,378.20
  4. Step 4: Simplify right side
    53,427.80x = 1,472,992,513.98
  5. Step 5: Solve for x
    x = 1,472,992,513.98/53,427.80
  6. Step 6: Final answer
    x = 27,569.78

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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.