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Finding the Fourth Proportional to 128,312.00, 192,455.61 and 39,541.67

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Solution

The fourth proportional to 128,312.00, 192,455.61 and 39,541.67 is: 59,308.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312.00 : 192,455.61 = 39,541.67 : x
  2. Step 2: Convert to fraction form
    128,312.00/192,455.61 = 39,541.67/x
  3. Step 3: Cross multiply
    128,312.00x = 192,455.61 × 39,541.67
  4. Step 4: Simplify right side
    128,312.00x = 7,610,015,257.99
  5. Step 5: Solve for x
    x = 7,610,015,257.99/128,312.00
  6. Step 6: Final answer
    x = 59,308.68

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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.