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Finding the Fourth Proportional to 111,166.36, 153,411.54 and 79,389.40

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Solution

The fourth proportional to 111,166.36, 153,411.54 and 79,389.40 is: 109,558.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,166.36 : 153,411.54 = 79,389.40 : x
  2. Step 2: Convert to fraction form
    111,166.36/153,411.54 = 79,389.40/x
  3. Step 3: Cross multiply
    111,166.36x = 153,411.54 × 79,389.40
  4. Step 4: Simplify right side
    111,166.36x = 12,179,250,113.68
  5. Step 5: Solve for x
    x = 12,179,250,113.68/111,166.36
  6. Step 6: Final answer
    x = 109,558.77

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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.