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Finding the Fourth Proportional to 104,918.79, 157,379.28 and 83,991.87

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Solution

The fourth proportional to 104,918.79, 157,379.28 and 83,991.87 is: 125,988.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,918.79 : 157,379.28 = 83,991.87 : x
  2. Step 2: Convert to fraction form
    104,918.79/157,379.28 = 83,991.87/x
  3. Step 3: Cross multiply
    104,918.79x = 157,379.28 × 83,991.87
  4. Step 4: Simplify right side
    104,918.79x = 13,218,580,026.45
  5. Step 5: Solve for x
    x = 13,218,580,026.45/104,918.79
  6. Step 6: Final answer
    x = 125,988.68

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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.