Home / 128,896.35-177,898.34-75,181.36

Finding the Fourth Proportional to 128,896.35, 177,898.34 and 75,181.36

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Solution

The fourth proportional to 128,896.35, 177,898.34 and 75,181.36 is: 103,762.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896.35 : 177,898.34 = 75,181.36 : x
  2. Step 2: Convert to fraction form
    128,896.35/177,898.34 = 75,181.36/x
  3. Step 3: Cross multiply
    128,896.35x = 177,898.34 × 75,181.36
  4. Step 4: Simplify right side
    128,896.35x = 13,374,638,767.04
  5. Step 5: Solve for x
    x = 13,374,638,767.04/128,896.35
  6. Step 6: Final answer
    x = 103,762.75

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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.