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Finding the Fourth Proportional to 128,297.54, 177,007.18 and 83,032.71

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Solution

The fourth proportional to 128,297.54, 177,007.18 and 83,032.71 is: 114,557.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,297.54 : 177,007.18 = 83,032.71 : x
  2. Step 2: Convert to fraction form
    128,297.54/177,007.18 = 83,032.71/x
  3. Step 3: Cross multiply
    128,297.54x = 177,007.18 × 83,032.71
  4. Step 4: Simplify right side
    128,297.54x = 14,697,385,844.86
  5. Step 5: Solve for x
    x = 14,697,385,844.86/128,297.54
  6. Step 6: Final answer
    x = 114,557.04

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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.