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Finding the Fourth Proportional to 128,368.72, 192,392.64 and 61,796.44

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Solution

The fourth proportional to 128,368.72, 192,392.64 and 61,796.44 is: 92,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.72 : 192,392.64 = 61,796.44 : x
  2. Step 2: Convert to fraction form
    128,368.72/192,392.64 = 61,796.44/x
  3. Step 3: Cross multiply
    128,368.72x = 192,392.64 × 61,796.44
  4. Step 4: Simplify right side
    128,368.72x = 11,889,180,234.20
  5. Step 5: Solve for x
    x = 11,889,180,234.20/128,368.72
  6. Step 6: Final answer
    x = 92,617.42

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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.