Home / 136,638.90-188,561.05-75,383.42

Finding the Fourth Proportional to 136,638.90, 188,561.05 and 75,383.42

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Solution

The fourth proportional to 136,638.90, 188,561.05 and 75,383.42 is: 104,028.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,638.90 : 188,561.05 = 75,383.42 : x
  2. Step 2: Convert to fraction form
    136,638.90/188,561.05 = 75,383.42/x
  3. Step 3: Cross multiply
    136,638.90x = 188,561.05 × 75,383.42
  4. Step 4: Simplify right side
    136,638.90x = 14,214,376,686.32
  5. Step 5: Solve for x
    x = 14,214,376,686.32/136,638.90
  6. Step 6: Final answer
    x = 104,028.77

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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.