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Finding the Fourth Proportional to 153,362.35, 211,642.23 and 85,382.29

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Solution

The fourth proportional to 153,362.35, 211,642.23 and 85,382.29 is: 117,828.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,362.35 : 211,642.23 = 85,382.29 : x
  2. Step 2: Convert to fraction form
    153,362.35/211,642.23 = 85,382.29/x
  3. Step 3: Cross multiply
    153,362.35x = 211,642.23 × 85,382.29
  4. Step 4: Simplify right side
    153,362.35x = 18,070,498,258.11
  5. Step 5: Solve for x
    x = 18,070,498,258.11/153,362.35
  6. Step 6: Final answer
    x = 117,828.78

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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.