Home / 149,090.32-205,746-81,107.92

Finding the Fourth Proportional to 149,090.32, 205,746 and 81,107.92

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Solution

The fourth proportional to 149,090.32, 205,746 and 81,107.92 is: 111,929.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,090.32 : 205,746 = 81,107.92 : x
  2. Step 2: Convert to fraction form
    149,090.32/205,746 = 81,107.92/x
  3. Step 3: Cross multiply
    149,090.32x = 205,746 × 81,107.92
  4. Step 4: Simplify right side
    149,090.32x = 16,687,630,108.32
  5. Step 5: Solve for x
    x = 16,687,630,108.32/149,090.32
  6. Step 6: Final answer
    x = 111,929.67

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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.