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Finding the Fourth Proportional to 113,991.45, 157,303.31 and 63,001.54

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Solution

The fourth proportional to 113,991.45, 157,303.31 and 63,001.54 is: 86,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,991.45 : 157,303.31 = 63,001.54 : x
  2. Step 2: Convert to fraction form
    113,991.45/157,303.31 = 63,001.54/x
  3. Step 3: Cross multiply
    113,991.45x = 157,303.31 × 63,001.54
  4. Step 4: Simplify right side
    113,991.45x = 9,910,350,462.09
  5. Step 5: Solve for x
    x = 9,910,350,462.09/113,991.45
  6. Step 6: Final answer
    x = 86,939.42

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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.