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Finding the Fourth Proportional to 101,580.32, 140,170.16 and 56,257.11

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Solution

The fourth proportional to 101,580.32, 140,170.16 and 56,257.11 is: 77,628.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,580.32 : 140,170.16 = 56,257.11 : x
  2. Step 2: Convert to fraction form
    101,580.32/140,170.16 = 56,257.11/x
  3. Step 3: Cross multiply
    101,580.32x = 140,170.16 × 56,257.11
  4. Step 4: Simplify right side
    101,580.32x = 7,885,567,828.55
  5. Step 5: Solve for x
    x = 7,885,567,828.55/101,580.32
  6. Step 6: Final answer
    x = 77,628.90

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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.