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Finding the Fourth Proportional to 128,281.78, 177,078.18 and 114,829.30

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Solution

The fourth proportional to 128,281.78, 177,078.18 and 114,829.30 is: 158,508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,281.78 : 177,078.18 = 114,829.30 : x
  2. Step 2: Convert to fraction form
    128,281.78/177,078.18 = 114,829.30/x
  3. Step 3: Cross multiply
    128,281.78x = 177,078.18 × 114,829.30
  4. Step 4: Simplify right side
    128,281.78x = 20,333,763,454.67
  5. Step 5: Solve for x
    x = 20,333,763,454.67/128,281.78
  6. Step 6: Final answer
    x = 158,508.59

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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.