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Finding the Fourth Proportional to 98,609.73, 136,048.19 and 56,138.19

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Solution

The fourth proportional to 98,609.73, 136,048.19 and 56,138.19 is: 77,451.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,609.73 : 136,048.19 = 56,138.19 : x
  2. Step 2: Convert to fraction form
    98,609.73/136,048.19 = 56,138.19/x
  3. Step 3: Cross multiply
    98,609.73x = 136,048.19 × 56,138.19
  4. Step 4: Simplify right side
    98,609.73x = 7,637,498,858.69
  5. Step 5: Solve for x
    x = 7,637,498,858.69/98,609.73
  6. Step 6: Final answer
    x = 77,451.78

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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.