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Finding the Fourth Proportional to 128,497.82, 177,324.25 and 71,133.86

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Solution

The fourth proportional to 128,497.82, 177,324.25 and 71,133.86 is: 98,163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,497.82 : 177,324.25 = 71,133.86 : x
  2. Step 2: Convert to fraction form
    128,497.82/177,324.25 = 71,133.86/x
  3. Step 3: Cross multiply
    128,497.82x = 177,324.25 × 71,133.86
  4. Step 4: Simplify right side
    128,497.82x = 12,613,758,374.11
  5. Step 5: Solve for x
    x = 12,613,758,374.11/128,497.82
  6. Step 6: Final answer
    x = 98,163.21

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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.