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Finding the Fourth Proportional to 139,899.32, 209,771.22 and 56,696.12

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Solution

The fourth proportional to 139,899.32, 209,771.22 and 56,696.12 is: 85,012.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,899.32 : 209,771.22 = 56,696.12 : x
  2. Step 2: Convert to fraction form
    139,899.32/209,771.22 = 56,696.12/x
  3. Step 3: Cross multiply
    139,899.32x = 209,771.22 × 56,696.12
  4. Step 4: Simplify right side
    139,899.32x = 11,893,214,261.67
  5. Step 5: Solve for x
    x = 11,893,214,261.67/139,899.32
  6. Step 6: Final answer
    x = 85,012.67

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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.