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Finding the Fourth Proportional to 128,649.16, 177,622.48 and 80,324.66

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Solution

The fourth proportional to 128,649.16, 177,622.48 and 80,324.66 is: 110,902.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,649.16 : 177,622.48 = 80,324.66 : x
  2. Step 2: Convert to fraction form
    128,649.16/177,622.48 = 80,324.66/x
  3. Step 3: Cross multiply
    128,649.16x = 177,622.48 × 80,324.66
  4. Step 4: Simplify right side
    128,649.16x = 14,267,465,314.36
  5. Step 5: Solve for x
    x = 14,267,465,314.36/128,649.16
  6. Step 6: Final answer
    x = 110,902.13

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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.