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Finding the Fourth Proportional to 138,681.94, 208,054.26 and 43,917.88

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Solution

The fourth proportional to 138,681.94, 208,054.26 and 43,917.88 is: 65,886.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,681.94 : 208,054.26 = 43,917.88 : x
  2. Step 2: Convert to fraction form
    138,681.94/208,054.26 = 43,917.88/x
  3. Step 3: Cross multiply
    138,681.94x = 208,054.26 × 43,917.88
  4. Step 4: Simplify right side
    138,681.94x = 9,137,302,024.17
  5. Step 5: Solve for x
    x = 9,137,302,024.17/138,681.94
  6. Step 6: Final answer
    x = 65,886.75

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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.