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Finding the Fourth Proportional to 138,707.64, 208,092.70 and 43,943.56

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Solution

The fourth proportional to 138,707.64, 208,092.70 and 43,943.56 is: 65,925.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,707.64 : 208,092.70 = 43,943.56 : x
  2. Step 2: Convert to fraction form
    138,707.64/208,092.70 = 43,943.56/x
  3. Step 3: Cross multiply
    138,707.64x = 208,092.70 × 43,943.56
  4. Step 4: Simplify right side
    138,707.64x = 9,144,334,048.01
  5. Step 5: Solve for x
    x = 9,144,334,048.01/138,707.64
  6. Step 6: Final answer
    x = 65,925.24

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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.