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Finding the Fourth Proportional to 98,710.16, 136,220.20 and 53,998.16

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Solution

The fourth proportional to 98,710.16, 136,220.20 and 53,998.16 is: 74,517.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,710.16 : 136,220.20 = 53,998.16 : x
  2. Step 2: Convert to fraction form
    98,710.16/136,220.20 = 53,998.16/x
  3. Step 3: Cross multiply
    98,710.16x = 136,220.20 × 53,998.16
  4. Step 4: Simplify right side
    98,710.16x = 7,355,640,154.83
  5. Step 5: Solve for x
    x = 7,355,640,154.83/98,710.16
  6. Step 6: Final answer
    x = 74,517.56

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Double scale
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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.