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Finding the Fourth Proportional to 128,832.69, 177,790.95 and 77,838.33

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Solution

The fourth proportional to 128,832.69, 177,790.95 and 77,838.33 is: 107,418.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,832.69 : 177,790.95 = 77,838.33 : x
  2. Step 2: Convert to fraction form
    128,832.69/177,790.95 = 77,838.33/x
  3. Step 3: Cross multiply
    128,832.69x = 177,790.95 × 77,838.33
  4. Step 4: Simplify right side
    128,832.69x = 13,838,950,247.92
  5. Step 5: Solve for x
    x = 13,838,950,247.92/128,832.69
  6. Step 6: Final answer
    x = 107,418.00

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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.