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Finding the Fourth Proportional to 138,417.26, 191,008.71 and 77,991.44

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Solution

The fourth proportional to 138,417.26, 191,008.71 and 77,991.44 is: 107,624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,417.26 : 191,008.71 = 77,991.44 : x
  2. Step 2: Convert to fraction form
    138,417.26/191,008.71 = 77,991.44/x
  3. Step 3: Cross multiply
    138,417.26x = 191,008.71 × 77,991.44
  4. Step 4: Simplify right side
    138,417.26x = 14,897,043,390.40
  5. Step 5: Solve for x
    x = 14,897,043,390.40/138,417.26
  6. Step 6: Final answer
    x = 107,624.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.