Home / 81,187.92-121,585.06-56,157.72

Finding the Fourth Proportional to 81,187.92, 121,585.06 and 56,157.72

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Solution

The fourth proportional to 81,187.92, 121,585.06 and 56,157.72 is: 84,100.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,187.92 : 121,585.06 = 56,157.72 : x
  2. Step 2: Convert to fraction form
    81,187.92/121,585.06 = 56,157.72/x
  3. Step 3: Cross multiply
    81,187.92x = 121,585.06 × 56,157.72
  4. Step 4: Simplify right side
    81,187.92x = 6,827,939,755.66
  5. Step 5: Solve for x
    x = 6,827,939,755.66/81,187.92
  6. Step 6: Final answer
    x = 84,100.44

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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.