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Finding the Fourth Proportional to 85,583.61, 128,365.70 and 23,258.97

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Solution

The fourth proportional to 85,583.61, 128,365.70 and 23,258.97 is: 34,885.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,583.61 : 128,365.70 = 23,258.97 : x
  2. Step 2: Convert to fraction form
    85,583.61/128,365.70 = 23,258.97/x
  3. Step 3: Cross multiply
    85,583.61x = 128,365.70 × 23,258.97
  4. Step 4: Simplify right side
    85,583.61x = 2,985,653,849.03
  5. Step 5: Solve for x
    x = 2,985,653,849.03/85,583.61
  6. Step 6: Final answer
    x = 34,885.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.