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Finding the Fourth Proportional to 101,395.89, 139,919.09 and 56,065.50

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Solution

The fourth proportional to 101,395.89, 139,919.09 and 56,065.50 is: 77,366.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,395.89 : 139,919.09 = 56,065.50 : x
  2. Step 2: Convert to fraction form
    101,395.89/139,919.09 = 56,065.50/x
  3. Step 3: Cross multiply
    101,395.89x = 139,919.09 × 56,065.50
  4. Step 4: Simplify right side
    101,395.89x = 7,844,633,460.07
  5. Step 5: Solve for x
    x = 7,844,633,460.07/101,395.89
  6. Step 6: Final answer
    x = 77,366.38

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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.