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Finding the Fourth Proportional to 128,866.18, 177,204.72 and 111,840.85

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Solution

The fourth proportional to 128,866.18, 177,204.72 and 111,840.85 is: 153,793.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,866.18 : 177,204.72 = 111,840.85 : x
  2. Step 2: Convert to fraction form
    128,866.18/177,204.72 = 111,840.85/x
  3. Step 3: Cross multiply
    128,866.18x = 177,204.72 × 111,840.85
  4. Step 4: Simplify right side
    128,866.18x = 19,818,726,508.81
  5. Step 5: Solve for x
    x = 19,818,726,508.81/128,866.18
  6. Step 6: Final answer
    x = 153,793.08

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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.