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Finding the Fourth Proportional to 111,328.88, 153,640.14 and 66,033.68

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Solution

The fourth proportional to 111,328.88, 153,640.14 and 66,033.68 is: 91,130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,328.88 : 153,640.14 = 66,033.68 : x
  2. Step 2: Convert to fraction form
    111,328.88/153,640.14 = 66,033.68/x
  3. Step 3: Cross multiply
    111,328.88x = 153,640.14 × 66,033.68
  4. Step 4: Simplify right side
    111,328.88x = 10,145,423,839.92
  5. Step 5: Solve for x
    x = 10,145,423,839.92/111,328.88
  6. Step 6: Final answer
    x = 91,130.21

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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.