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Finding the Fourth Proportional to 101,138.72, 139,579.35 and 55,825.70

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Solution

The fourth proportional to 101,138.72, 139,579.35 and 55,825.70 is: 77,043.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,138.72 : 139,579.35 = 55,825.70 : x
  2. Step 2: Convert to fraction form
    101,138.72/139,579.35 = 55,825.70/x
  3. Step 3: Cross multiply
    101,138.72x = 139,579.35 × 55,825.70
  4. Step 4: Simplify right side
    101,138.72x = 7,792,114,919.30
  5. Step 5: Solve for x
    x = 7,792,114,919.30/101,138.72
  6. Step 6: Final answer
    x = 77,043.84

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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.