Home / 81,410.36-121,905.23-56,187.72

Finding the Fourth Proportional to 81,410.36, 121,905.23 and 56,187.72

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Solution

The fourth proportional to 81,410.36, 121,905.23 and 56,187.72 is: 84,136.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.36 : 121,905.23 = 56,187.72 : x
  2. Step 2: Convert to fraction form
    81,410.36/121,905.23 = 56,187.72/x
  3. Step 3: Cross multiply
    81,410.36x = 121,905.23 × 56,187.72
  4. Step 4: Simplify right side
    81,410.36x = 6,849,576,648.84
  5. Step 5: Solve for x
    x = 6,849,576,648.84/81,410.36
  6. Step 6: Final answer
    x = 84,136.43

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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.