Home / 81,303.63-121,970.43-36,933.72

Finding the Fourth Proportional to 81,303.63, 121,970.43 and 36,933.72

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Solution

The fourth proportional to 81,303.63, 121,970.43 and 36,933.72 is: 55,407.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.63 : 121,970.43 = 36,933.72 : x
  2. Step 2: Convert to fraction form
    81,303.63/121,970.43 = 36,933.72/x
  3. Step 3: Cross multiply
    81,303.63x = 121,970.43 × 36,933.72
  4. Step 4: Simplify right side
    81,303.63x = 4,504,821,709.90
  5. Step 5: Solve for x
    x = 4,504,821,709.90/81,303.63
  6. Step 6: Final answer
    x = 55,407.39

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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.