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Finding the Fourth Proportional to 111,169.36, 153,415.68 and 79,392.40

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Solution

The fourth proportional to 111,169.36, 153,415.68 and 79,392.40 is: 109,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,169.36 : 153,415.68 = 79,392.40 : x
  2. Step 2: Convert to fraction form
    111,169.36/153,415.68 = 79,392.40/x
  3. Step 3: Cross multiply
    111,169.36x = 153,415.68 × 79,392.40
  4. Step 4: Simplify right side
    111,169.36x = 12,180,039,032.83
  5. Step 5: Solve for x
    x = 12,180,039,032.83/111,169.36
  6. Step 6: Final answer
    x = 109,562.91

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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.