Home / 149,120.80-205,911.20-99,043.36

Finding the Fourth Proportional to 149,120.80, 205,911.20 and 99,043.36

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Solution

The fourth proportional to 149,120.80, 205,911.20 and 99,043.36 is: 136,762.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,120.80 : 205,911.20 = 99,043.36 : x
  2. Step 2: Convert to fraction form
    149,120.80/205,911.20 = 99,043.36/x
  3. Step 3: Cross multiply
    149,120.80x = 205,911.20 × 99,043.36
  4. Step 4: Simplify right side
    149,120.80x = 20,394,137,109.63
  5. Step 5: Solve for x
    x = 20,394,137,109.63/149,120.80
  6. Step 6: Final answer
    x = 136,762.52

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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.