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Finding the Fourth Proportional to 139,619.08, 209,467.50 and 77,333.32

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Solution

The fourth proportional to 139,619.08, 209,467.50 and 77,333.32 is: 116,021.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,619.08 : 209,467.50 = 77,333.32 : x
  2. Step 2: Convert to fraction form
    139,619.08/209,467.50 = 77,333.32/x
  3. Step 3: Cross multiply
    139,619.08x = 209,467.50 × 77,333.32
  4. Step 4: Simplify right side
    139,619.08x = 16,198,817,207.10
  5. Step 5: Solve for x
    x = 16,198,817,207.10/139,619.08
  6. Step 6: Final answer
    x = 116,021.52

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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.