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Finding the Fourth Proportional to 86,474.67, 128,852.39 and 77,042.22

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Solution

The fourth proportional to 86,474.67, 128,852.39 and 77,042.22 is: 114,797.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,474.67 : 128,852.39 = 77,042.22 : x
  2. Step 2: Convert to fraction form
    86,474.67/128,852.39 = 77,042.22/x
  3. Step 3: Cross multiply
    86,474.67x = 128,852.39 × 77,042.22
  4. Step 4: Simplify right side
    86,474.67x = 9,927,074,177.91
  5. Step 5: Solve for x
    x = 9,927,074,177.91/86,474.67
  6. Step 6: Final answer
    x = 114,797.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.