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Finding the Fourth Proportional to 101,919.50, 140,650.80 and 56,601.70

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Solution

The fourth proportional to 101,919.50, 140,650.80 and 56,601.70 is: 78,111.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,919.50 : 140,650.80 = 56,601.70 : x
  2. Step 2: Convert to fraction form
    101,919.50/140,650.80 = 56,601.70/x
  3. Step 3: Cross multiply
    101,919.50x = 140,650.80 × 56,601.70
  4. Step 4: Simplify right side
    101,919.50x = 7,961,073,605.09
  5. Step 5: Solve for x
    x = 7,961,073,605.09/101,919.50
  6. Step 6: Final answer
    x = 78,111.39

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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.