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Finding the Fourth Proportional to 90,708.60, 136,009.14 and 27,509.40

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Solution

The fourth proportional to 90,708.60, 136,009.14 and 27,509.40 is: 41,247.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,708.60 : 136,009.14 = 27,509.40 : x
  2. Step 2: Convert to fraction form
    90,708.60/136,009.14 = 27,509.40/x
  3. Step 3: Cross multiply
    90,708.60x = 136,009.14 × 27,509.40
  4. Step 4: Simplify right side
    90,708.60x = 3,741,529,835.92
  5. Step 5: Solve for x
    x = 3,741,529,835.92/90,708.60
  6. Step 6: Final answer
    x = 41,247.80

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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.