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Finding the Fourth Proportional to 207,955.28, 311,960.72 and 72,987.28

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Solution

The fourth proportional to 207,955.28, 311,960.72 and 72,987.28 is: 109,490.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,955.28 : 311,960.72 = 72,987.28 : x
  2. Step 2: Convert to fraction form
    207,955.28/311,960.72 = 72,987.28/x
  3. Step 3: Cross multiply
    207,955.28x = 311,960.72 × 72,987.28
  4. Step 4: Simplify right side
    207,955.28x = 22,769,164,419.64
  5. Step 5: Solve for x
    x = 22,769,164,419.64/207,955.28
  6. Step 6: Final answer
    x = 109,490.68

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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.