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Finding the Fourth Proportional to 104,122.45, 143,678.77 and 61,672.78

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Solution

The fourth proportional to 104,122.45, 143,678.77 and 61,672.78 is: 85,102.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,122.45 : 143,678.77 = 61,672.78 : x
  2. Step 2: Convert to fraction form
    104,122.45/143,678.77 = 61,672.78/x
  3. Step 3: Cross multiply
    104,122.45x = 143,678.77 × 61,672.78
  4. Step 4: Simplify right side
    104,122.45x = 8,861,069,172.88
  5. Step 5: Solve for x
    x = 8,861,069,172.88/104,122.45
  6. Step 6: Final answer
    x = 85,102.39

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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.