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Finding the Fourth Proportional to 138,889.65, 208,346.79 and 39,050.72

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Solution

The fourth proportional to 138,889.65, 208,346.79 and 39,050.72 is: 58,579.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.65 : 208,346.79 = 39,050.72 : x
  2. Step 2: Convert to fraction form
    138,889.65/208,346.79 = 39,050.72/x
  3. Step 3: Cross multiply
    138,889.65x = 208,346.79 × 39,050.72
  4. Step 4: Simplify right side
    138,889.65x = 8,136,092,159.19
  5. Step 5: Solve for x
    x = 8,136,092,159.19/138,889.65
  6. Step 6: Final answer
    x = 58,579.54

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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.