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Finding the Fourth Proportional to 128,047.54, 191,976.14 and 61,424.22

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Solution

The fourth proportional to 128,047.54, 191,976.14 and 61,424.22 is: 92,090.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.54 : 191,976.14 = 61,424.22 : x
  2. Step 2: Convert to fraction form
    128,047.54/191,976.14 = 61,424.22/x
  3. Step 3: Cross multiply
    128,047.54x = 191,976.14 × 61,424.22
  4. Step 4: Simplify right side
    128,047.54x = 11,791,984,658.11
  5. Step 5: Solve for x
    x = 11,791,984,658.11/128,047.54
  6. Step 6: Final answer
    x = 92,090.68

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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.