Home / 128,896.15-177,898.07-75,181.17

Finding the Fourth Proportional to 128,896.15, 177,898.07 and 75,181.17

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Solution

The fourth proportional to 128,896.15, 177,898.07 and 75,181.17 is: 103,762.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896.15 : 177,898.07 = 75,181.17 : x
  2. Step 2: Convert to fraction form
    128,896.15/177,898.07 = 75,181.17/x
  3. Step 3: Cross multiply
    128,896.15x = 177,898.07 × 75,181.17
  4. Step 4: Simplify right side
    128,896.15x = 13,374,584,739.15
  5. Step 5: Solve for x
    x = 13,374,584,739.15/128,896.15
  6. Step 6: Final answer
    x = 103,762.48

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1.5x scale

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.