Home / 121,111.20-181,666.80-76,824.45

Finding the Fourth Proportional to 121,111.20, 181,666.80 and 76,824.45

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Solution

The fourth proportional to 121,111.20, 181,666.80 and 76,824.45 is: 115,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,111.20 : 181,666.80 = 76,824.45 : x
  2. Step 2: Convert to fraction form
    121,111.20/181,666.80 = 76,824.45/x
  3. Step 3: Cross multiply
    121,111.20x = 181,666.80 × 76,824.45
  4. Step 4: Simplify right side
    121,111.20x = 13,956,451,993.26
  5. Step 5: Solve for x
    x = 13,956,451,993.26/121,111.20
  6. Step 6: Final answer
    x = 115,236.68

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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.