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Finding the Fourth Proportional to 85,859.75, 128,788.20 and 23,530.25

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Solution

The fourth proportional to 85,859.75, 128,788.20 and 23,530.25 is: 35,294.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,859.75 : 128,788.20 = 23,530.25 : x
  2. Step 2: Convert to fraction form
    85,859.75/128,788.20 = 23,530.25/x
  3. Step 3: Cross multiply
    85,859.75x = 128,788.20 × 23,530.25
  4. Step 4: Simplify right side
    85,859.75x = 3,030,417,899.11
  5. Step 5: Solve for x
    x = 3,030,417,899.11/85,859.75
  6. Step 6: Final answer
    x = 35,294.98

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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.