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Finding the Fourth Proportional to 66,908.59, 100,379.76 and 47,225.59

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Solution

The fourth proportional to 66,908.59, 100,379.76 and 47,225.59 is: 70,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,908.59 : 100,379.76 = 47,225.59 : x
  2. Step 2: Convert to fraction form
    66,908.59/100,379.76 = 47,225.59/x
  3. Step 3: Cross multiply
    66,908.59x = 100,379.76 × 47,225.59
  4. Step 4: Simplify right side
    66,908.59x = 4,740,493,390.06
  5. Step 5: Solve for x
    x = 4,740,493,390.06/66,908.59
  6. Step 6: Final answer
    x = 70,850.30

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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.