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Finding the Fourth Proportional to 98,128.32, 135,415.44 and 57,843.60

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Solution

The fourth proportional to 98,128.32, 135,415.44 and 57,843.60 is: 79,823.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128.32 : 135,415.44 = 57,843.60 : x
  2. Step 2: Convert to fraction form
    98,128.32/135,415.44 = 57,843.60/x
  3. Step 3: Cross multiply
    98,128.32x = 135,415.44 × 57,843.60
  4. Step 4: Simplify right side
    98,128.32x = 7,832,916,545.18
  5. Step 5: Solve for x
    x = 7,832,916,545.18/98,128.32
  6. Step 6: Final answer
    x = 79,823.20

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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.