Home / 81,207.84-121,816.32-30,606.24

Finding the Fourth Proportional to 81,207.84, 121,816.32 and 30,606.24

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Solution

The fourth proportional to 81,207.84, 121,816.32 and 30,606.24 is: 45,911.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,207.84 : 121,816.32 = 30,606.24 : x
  2. Step 2: Convert to fraction form
    81,207.84/121,816.32 = 30,606.24/x
  3. Step 3: Cross multiply
    81,207.84x = 121,816.32 × 30,606.24
  4. Step 4: Simplify right side
    81,207.84x = 3,728,339,525.84
  5. Step 5: Solve for x
    x = 3,728,339,525.84/81,207.84
  6. Step 6: Final answer
    x = 45,911.08

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1.5x scale

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.