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Finding the Fourth Proportional to 90,709.40, 136,064.40 and 27,530.06

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Solution

The fourth proportional to 90,709.40, 136,064.40 and 27,530.06 is: 41,295.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,709.40 : 136,064.40 = 27,530.06 : x
  2. Step 2: Convert to fraction form
    90,709.40/136,064.40 = 27,530.06/x
  3. Step 3: Cross multiply
    90,709.40x = 136,064.40 × 27,530.06
  4. Step 4: Simplify right side
    90,709.40x = 3,745,861,095.86
  5. Step 5: Solve for x
    x = 3,745,861,095.86/90,709.40
  6. Step 6: Final answer
    x = 41,295.18

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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.