Home / 128,231.42-177,008.75-114,778.94

Finding the Fourth Proportional to 128,231.42, 177,008.75 and 114,778.94

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Solution

The fourth proportional to 128,231.42, 177,008.75 and 114,778.94 is: 158,439.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.42 : 177,008.75 = 114,778.94 : x
  2. Step 2: Convert to fraction form
    128,231.42/177,008.75 = 114,778.94/x
  3. Step 3: Cross multiply
    128,231.42x = 177,008.75 × 114,778.94
  4. Step 4: Simplify right side
    128,231.42x = 20,316,876,994.77
  5. Step 5: Solve for x
    x = 20,316,876,994.77/128,231.42
  6. Step 6: Final answer
    x = 158,439.15

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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.