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Finding the Fourth Proportional to 100,382.35, 138,528.35 and 55,060.67

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Solution

The fourth proportional to 100,382.35, 138,528.35 and 55,060.67 is: 75,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,382.35 : 138,528.35 = 55,060.67 : x
  2. Step 2: Convert to fraction form
    100,382.35/138,528.35 = 55,060.67/x
  3. Step 3: Cross multiply
    100,382.35x = 138,528.35 × 55,060.67
  4. Step 4: Simplify right side
    100,382.35x = 7,627,463,764.99
  5. Step 5: Solve for x
    x = 7,627,463,764.99/100,382.35
  6. Step 6: Final answer
    x = 75,984.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.