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Finding the Fourth Proportional to 91,087.40, 136,631.10 and 27,907.40

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Solution

The fourth proportional to 91,087.40, 136,631.10 and 27,907.40 is: 41,861.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,087.40 : 136,631.10 = 27,907.40 : x
  2. Step 2: Convert to fraction form
    91,087.40/136,631.10 = 27,907.40/x
  3. Step 3: Cross multiply
    91,087.40x = 136,631.10 × 27,907.40
  4. Step 4: Simplify right side
    91,087.40x = 3,813,018,760.14
  5. Step 5: Solve for x
    x = 3,813,018,760.14/91,087.40
  6. Step 6: Final answer
    x = 41,861.10

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Similar ratio
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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.