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Finding the Fourth Proportional to 207,620.40, 311,315.40 and 89,271.60

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Solution

The fourth proportional to 207,620.40, 311,315.40 and 89,271.60 is: 133,857.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,620.40 : 311,315.40 = 89,271.60 : x
  2. Step 2: Convert to fraction form
    207,620.40/311,315.40 = 89,271.60/x
  3. Step 3: Cross multiply
    207,620.40x = 311,315.40 × 89,271.60
  4. Step 4: Simplify right side
    207,620.40x = 27,791,623,862.64
  5. Step 5: Solve for x
    x = 27,791,623,862.64/207,620.40
  6. Step 6: Final answer
    x = 133,857.87

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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.