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Finding the Fourth Proportional to 239,509.44, 330,485.76 and 138,888

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Solution

The fourth proportional to 239,509.44, 330,485.76 and 138,888 is: 191,643.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,509.44 : 330,485.76 = 138,888 : x
  2. Step 2: Convert to fraction form
    239,509.44/330,485.76 = 138,888/x
  3. Step 3: Cross multiply
    239,509.44x = 330,485.76 × 138,888
  4. Step 4: Simplify right side
    239,509.44x = 45,900,506,234.88
  5. Step 5: Solve for x
    x = 45,900,506,234.88/239,509.44
  6. Step 6: Final answer
    x = 191,643.83

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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.