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Finding the Fourth Proportional to 101,541.57, 140,128.47 and 56,220.36

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Solution

The fourth proportional to 101,541.57, 140,128.47 and 56,220.36 is: 77,584.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,541.57 : 140,128.47 = 56,220.36 : x
  2. Step 2: Convert to fraction form
    101,541.57/140,128.47 = 56,220.36/x
  3. Step 3: Cross multiply
    101,541.57x = 140,128.47 × 56,220.36
  4. Step 4: Simplify right side
    101,541.57x = 7,878,073,450.51
  5. Step 5: Solve for x
    x = 7,878,073,450.51/101,541.57
  6. Step 6: Final answer
    x = 77,584.71

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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.