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Finding the Fourth Proportional to 153,368.50, 211,643.00 and 85,383.73

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Solution

The fourth proportional to 153,368.50, 211,643.00 and 85,383.73 is: 117,826.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,368.50 : 211,643.00 = 85,383.73 : x
  2. Step 2: Convert to fraction form
    153,368.50/211,643.00 = 85,383.73/x
  3. Step 3: Cross multiply
    153,368.50x = 211,643.00 × 85,383.73
  4. Step 4: Simplify right side
    153,368.50x = 18,070,867,584.36
  5. Step 5: Solve for x
    x = 18,070,867,584.36/153,368.50
  6. Step 6: Final answer
    x = 117,826.46

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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.