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Finding the Fourth Proportional to 128,234.61, 177,013.15 and 114,782.13

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Solution

The fourth proportional to 128,234.61, 177,013.15 and 114,782.13 is: 158,443.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,234.61 : 177,013.15 = 114,782.13 : x
  2. Step 2: Convert to fraction form
    128,234.61/177,013.15 = 114,782.13/x
  3. Step 3: Cross multiply
    128,234.61x = 177,013.15 × 114,782.13
  4. Step 4: Simplify right side
    128,234.61x = 20,317,946,108.05
  5. Step 5: Solve for x
    x = 20,317,946,108.05/128,234.61
  6. Step 6: Final answer
    x = 158,443.54

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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.