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Finding the Fourth Proportional to 53,959.80, 80,939.70 and 30,631.80

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Solution

The fourth proportional to 53,959.80, 80,939.70 and 30,631.80 is: 45,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,959.80 : 80,939.70 = 30,631.80 : x
  2. Step 2: Convert to fraction form
    53,959.80/80,939.70 = 30,631.80/x
  3. Step 3: Cross multiply
    53,959.80x = 80,939.70 × 30,631.80
  4. Step 4: Simplify right side
    53,959.80x = 2,479,328,702.46
  5. Step 5: Solve for x
    x = 2,479,328,702.46/53,959.80
  6. Step 6: Final answer
    x = 45,947.70

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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.