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Finding the Fourth Proportional to 90,900.59, 136,372.50 and 45,811.13

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Solution

The fourth proportional to 90,900.59, 136,372.50 and 45,811.13 is: 68,727.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,900.59 : 136,372.50 = 45,811.13 : x
  2. Step 2: Convert to fraction form
    90,900.59/136,372.50 = 45,811.13/x
  3. Step 3: Cross multiply
    90,900.59x = 136,372.50 × 45,811.13
  4. Step 4: Simplify right side
    90,900.59x = 6,247,377,644.06
  5. Step 5: Solve for x
    x = 6,247,377,644.06/90,900.59
  6. Step 6: Final answer
    x = 68,727.58

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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.