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Finding the Fourth Proportional to 138,161.63, 190,663.05 and 78,545.63

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Solution

The fourth proportional to 138,161.63, 190,663.05 and 78,545.63 is: 108,392.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,161.63 : 190,663.05 = 78,545.63 : x
  2. Step 2: Convert to fraction form
    138,161.63/190,663.05 = 78,545.63/x
  3. Step 3: Cross multiply
    138,161.63x = 190,663.05 × 78,545.63
  4. Step 4: Simplify right side
    138,161.63x = 14,975,748,426.66
  5. Step 5: Solve for x
    x = 14,975,748,426.66/138,161.63
  6. Step 6: Final answer
    x = 108,392.97

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