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Finding the Fourth Proportional to 92,820.66, 128,092.64 and 50,379.20

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Solution

The fourth proportional to 92,820.66, 128,092.64 and 50,379.20 is: 69,523.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,820.66 : 128,092.64 = 50,379.20 : x
  2. Step 2: Convert to fraction form
    92,820.66/128,092.64 = 50,379.20/x
  3. Step 3: Cross multiply
    92,820.66x = 128,092.64 × 50,379.20
  4. Step 4: Simplify right side
    92,820.66x = 6,453,204,729.09
  5. Step 5: Solve for x
    x = 6,453,204,729.09/92,820.66
  6. Step 6: Final answer
    x = 69,523.37

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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.