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Finding the Fourth Proportional to 333,756.60, 500,638.08 and 81,039.36

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Solution

The fourth proportional to 333,756.60, 500,638.08 and 81,039.36 is: 121,559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,756.60 : 500,638.08 = 81,039.36 : x
  2. Step 2: Convert to fraction form
    333,756.60/500,638.08 = 81,039.36/x
  3. Step 3: Cross multiply
    333,756.60x = 500,638.08 × 81,039.36
  4. Step 4: Simplify right side
    333,756.60x = 40,571,389,594.83
  5. Step 5: Solve for x
    x = 40,571,389,594.83/333,756.60
  6. Step 6: Final answer
    x = 121,559.81

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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.