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Finding the Fourth Proportional to 90,368.40, 135,528.30 and 27,188.40

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Solution

The fourth proportional to 90,368.40, 135,528.30 and 27,188.40 is: 40,775.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,368.40 : 135,528.30 = 27,188.40 : x
  2. Step 2: Convert to fraction form
    90,368.40/135,528.30 = 27,188.40/x
  3. Step 3: Cross multiply
    90,368.40x = 135,528.30 × 27,188.40
  4. Step 4: Simplify right side
    90,368.40x = 3,684,797,631.72
  5. Step 5: Solve for x
    x = 3,684,797,631.72/90,368.40
  6. Step 6: Final answer
    x = 40,775.29

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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.