Home / 149,262.07-205,986.75-81,280.21

Finding the Fourth Proportional to 149,262.07, 205,986.75 and 81,280.21

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Solution

The fourth proportional to 149,262.07, 205,986.75 and 81,280.21 is: 112,169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,262.07 : 205,986.75 = 81,280.21 : x
  2. Step 2: Convert to fraction form
    149,262.07/205,986.75 = 81,280.21/x
  3. Step 3: Cross multiply
    149,262.07x = 205,986.75 × 81,280.21
  4. Step 4: Simplify right side
    149,262.07x = 16,742,646,297.22
  5. Step 5: Solve for x
    x = 16,742,646,297.22/149,262.07
  6. Step 6: Final answer
    x = 112,169.46

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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.