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Finding the Fourth Proportional to 138,915.99, 208,386.26 and 39,077.01

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Solution

The fourth proportional to 138,915.99, 208,386.26 and 39,077.01 is: 58,618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.99 : 208,386.26 = 39,077.01 : x
  2. Step 2: Convert to fraction form
    138,915.99/208,386.26 = 39,077.01/x
  3. Step 3: Cross multiply
    138,915.99x = 208,386.26 × 39,077.01
  4. Step 4: Simplify right side
    138,915.99x = 8,143,111,965.88
  5. Step 5: Solve for x
    x = 8,143,111,965.88/138,915.99
  6. Step 6: Final answer
    x = 58,618.97

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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.