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Finding the Fourth Proportional to 139,611.72, 209,416.62 and 56,504.52

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Solution

The fourth proportional to 139,611.72, 209,416.62 and 56,504.52 is: 84,756.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,611.72 : 209,416.62 = 56,504.52 : x
  2. Step 2: Convert to fraction form
    139,611.72/209,416.62 = 56,504.52/x
  3. Step 3: Cross multiply
    139,611.72x = 209,416.62 × 56,504.52
  4. Step 4: Simplify right side
    139,611.72x = 11,832,985,593.12
  5. Step 5: Solve for x
    x = 11,832,985,593.12/139,611.72
  6. Step 6: Final answer
    x = 84,756.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.