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Finding the Fourth Proportional to 239,152, 330,029.76 and 138,608.32

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Solution

The fourth proportional to 239,152, 330,029.76 and 138,608.32 is: 191,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,152 : 330,029.76 = 138,608.32 : x
  2. Step 2: Convert to fraction form
    239,152/330,029.76 = 138,608.32/x
  3. Step 3: Cross multiply
    239,152x = 330,029.76 × 138,608.32
  4. Step 4: Simplify right side
    239,152x = 45,744,870,583.60
  5. Step 5: Solve for x
    x = 45,744,870,583.60/239,152
  6. Step 6: Final answer
    x = 191,279.48

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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.