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Finding the Fourth Proportional to 101,416.50, 139,961.25 and 56,704.50

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Solution

The fourth proportional to 101,416.50, 139,961.25 and 56,704.50 is: 78,255.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,416.50 : 139,961.25 = 56,704.50 : x
  2. Step 2: Convert to fraction form
    101,416.50/139,961.25 = 56,704.50/x
  3. Step 3: Cross multiply
    101,416.50x = 139,961.25 × 56,704.50
  4. Step 4: Simplify right side
    101,416.50x = 7,936,432,700.63
  5. Step 5: Solve for x
    x = 7,936,432,700.63/101,416.50
  6. Step 6: Final answer
    x = 78,255.83

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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.