Home / 81,459.21-112,418.37-45,660.78

Finding the Fourth Proportional to 81,459.21, 112,418.37 and 45,660.78

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Solution

The fourth proportional to 81,459.21, 112,418.37 and 45,660.78 is: 63,014.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,459.21 : 112,418.37 = 45,660.78 : x
  2. Step 2: Convert to fraction form
    81,459.21/112,418.37 = 45,660.78/x
  3. Step 3: Cross multiply
    81,459.21x = 112,418.37 × 45,660.78
  4. Step 4: Simplify right side
    81,459.21x = 5,133,110,460.53
  5. Step 5: Solve for x
    x = 5,133,110,460.53/81,459.21
  6. Step 6: Final answer
    x = 63,014.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.