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Finding the Fourth Proportional to 138,889.41, 208,346.42 and 39,050.47

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Solution

The fourth proportional to 138,889.41, 208,346.42 and 39,050.47 is: 58,579.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.41 : 208,346.42 = 39,050.47 : x
  2. Step 2: Convert to fraction form
    138,889.41/208,346.42 = 39,050.47/x
  3. Step 3: Cross multiply
    138,889.41x = 208,346.42 × 39,050.47
  4. Step 4: Simplify right side
    138,889.41x = 8,136,025,623.82
  5. Step 5: Solve for x
    x = 8,136,025,623.82/138,889.41
  6. Step 6: Final answer
    x = 58,579.16

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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.