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Finding the Fourth Proportional to 131,471.20, 197,206.80 and 37,986.40

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Solution

The fourth proportional to 131,471.20, 197,206.80 and 37,986.40 is: 56,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,471.20 : 197,206.80 = 37,986.40 : x
  2. Step 2: Convert to fraction form
    131,471.20/197,206.80 = 37,986.40/x
  3. Step 3: Cross multiply
    131,471.20x = 197,206.80 × 37,986.40
  4. Step 4: Simplify right side
    131,471.20x = 7,491,176,387.52
  5. Step 5: Solve for x
    x = 7,491,176,387.52/131,471.20
  6. Step 6: Final answer
    x = 56,979.60

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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.