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Finding the Fourth Proportional to 138,890.41, 208,347.92 and 39,051.47

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Solution

The fourth proportional to 138,890.41, 208,347.92 and 39,051.47 is: 58,580.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,890.41 : 208,347.92 = 39,051.47 : x
  2. Step 2: Convert to fraction form
    138,890.41/208,347.92 = 39,051.47/x
  3. Step 3: Cross multiply
    138,890.41x = 208,347.92 × 39,051.47
  4. Step 4: Simplify right side
    138,890.41x = 8,136,292,547.44
  5. Step 5: Solve for x
    x = 8,136,292,547.44/138,890.41
  6. Step 6: Final answer
    x = 58,580.66

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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.