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Finding the Fourth Proportional to 207,422.20, 310,914.60 and 81,013.60

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Solution

The fourth proportional to 207,422.20, 310,914.60 and 81,013.60 is: 121,434.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,422.20 : 310,914.60 = 81,013.60 : x
  2. Step 2: Convert to fraction form
    207,422.20/310,914.60 = 81,013.60/x
  3. Step 3: Cross multiply
    207,422.20x = 310,914.60 × 81,013.60
  4. Step 4: Simplify right side
    207,422.20x = 25,188,311,038.56
  5. Step 5: Solve for x
    x = 25,188,311,038.56/207,422.20
  6. Step 6: Final answer
    x = 121,434.98

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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.