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Finding the Fourth Proportional to 153,305.84, 211,549.56 and 85,317.68

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Solution

The fourth proportional to 153,305.84, 211,549.56 and 85,317.68 is: 117,731.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,305.84 : 211,549.56 = 85,317.68 : x
  2. Step 2: Convert to fraction form
    153,305.84/211,549.56 = 85,317.68/x
  3. Step 3: Cross multiply
    153,305.84x = 211,549.56 × 85,317.68
  4. Step 4: Simplify right side
    153,305.84x = 18,048,917,664.22
  5. Step 5: Solve for x
    x = 18,048,917,664.22/153,305.84
  6. Step 6: Final answer
    x = 117,731.44

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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.