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Finding the Fourth Proportional to 128,179.39, 176,894.30 and 77,208.11

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Solution

The fourth proportional to 128,179.39, 176,894.30 and 77,208.11 is: 106,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,179.39 : 176,894.30 = 77,208.11 : x
  2. Step 2: Convert to fraction form
    128,179.39/176,894.30 = 77,208.11/x
  3. Step 3: Cross multiply
    128,179.39x = 176,894.30 × 77,208.11
  4. Step 4: Simplify right side
    128,179.39x = 13,657,673,651.35
  5. Step 5: Solve for x
    x = 13,657,673,651.35/128,179.39
  6. Step 6: Final answer
    x = 106,551.25

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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.