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Finding the Fourth Proportional to 89,927.40, 134,891.10 and 72,431.40

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Solution

The fourth proportional to 89,927.40, 134,891.10 and 72,431.40 is: 108,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,927.40 : 134,891.10 = 72,431.40 : x
  2. Step 2: Convert to fraction form
    89,927.40/134,891.10 = 72,431.40/x
  3. Step 3: Cross multiply
    89,927.40x = 134,891.10 × 72,431.40
  4. Step 4: Simplify right side
    89,927.40x = 9,770,351,220.54
  5. Step 5: Solve for x
    x = 9,770,351,220.54/89,927.40
  6. Step 6: Final answer
    x = 108,647.10

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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.