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Finding the Fourth Proportional to 153,640.88, 211,904.22 and 99,943.04

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Solution

The fourth proportional to 153,640.88, 211,904.22 and 99,943.04 is: 137,843.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,640.88 : 211,904.22 = 99,943.04 : x
  2. Step 2: Convert to fraction form
    153,640.88/211,904.22 = 99,943.04/x
  3. Step 3: Cross multiply
    153,640.88x = 211,904.22 × 99,943.04
  4. Step 4: Simplify right side
    153,640.88x = 21,178,351,935.63
  5. Step 5: Solve for x
    x = 21,178,351,935.63/153,640.88
  6. Step 6: Final answer
    x = 137,843.21

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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.