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Finding the Fourth Proportional to 90,365.93, 135,586.06 and 39,738.90

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Solution

The fourth proportional to 90,365.93, 135,586.06 and 39,738.90 is: 59,624.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,365.93 : 135,586.06 = 39,738.90 : x
  2. Step 2: Convert to fraction form
    90,365.93/135,586.06 = 39,738.90/x
  3. Step 3: Cross multiply
    90,365.93x = 135,586.06 × 39,738.90
  4. Step 4: Simplify right side
    90,365.93x = 5,388,041,568.25
  5. Step 5: Solve for x
    x = 5,388,041,568.25/90,365.93
  6. Step 6: Final answer
    x = 59,624.70

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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.