Home / 128,365.44-177,144.72-71,790.24

Finding the Fourth Proportional to 128,365.44, 177,144.72 and 71,790.24

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Solution

The fourth proportional to 128,365.44, 177,144.72 and 71,790.24 is: 99,070.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.44 : 177,144.72 = 71,790.24 : x
  2. Step 2: Convert to fraction form
    128,365.44/177,144.72 = 71,790.24/x
  3. Step 3: Cross multiply
    128,365.44x = 177,144.72 × 71,790.24
  4. Step 4: Simplify right side
    128,365.44x = 12,717,261,963.53
  5. Step 5: Solve for x
    x = 12,717,261,963.53/128,365.44
  6. Step 6: Final answer
    x = 99,070.76

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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.