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Finding the Fourth Proportional to 128,767.42, 193,122.96 and 65,520.46

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Solution

The fourth proportional to 128,767.42, 193,122.96 and 65,520.46 is: 98,266.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,767.42 : 193,122.96 = 65,520.46 : x
  2. Step 2: Convert to fraction form
    128,767.42/193,122.96 = 65,520.46/x
  3. Step 3: Cross multiply
    128,767.42x = 193,122.96 × 65,520.46
  4. Step 4: Simplify right side
    128,767.42x = 12,653,505,175.76
  5. Step 5: Solve for x
    x = 12,653,505,175.76/128,767.42
  6. Step 6: Final answer
    x = 98,266.36

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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.