Home / 149,131.87-205,798.93-81,150.19

Finding the Fourth Proportional to 149,131.87, 205,798.93 and 81,150.19

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Solution

The fourth proportional to 149,131.87, 205,798.93 and 81,150.19 is: 111,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,131.87 : 205,798.93 = 81,150.19 : x
  2. Step 2: Convert to fraction form
    149,131.87/205,798.93 = 81,150.19/x
  3. Step 3: Cross multiply
    149,131.87x = 205,798.93 × 81,150.19
  4. Step 4: Simplify right side
    149,131.87x = 16,700,622,271.30
  5. Step 5: Solve for x
    x = 16,700,622,271.30/149,131.87
  6. Step 6: Final answer
    x = 111,985.60

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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.