Home / 128,664.08-177,556.44-72,076.64

Finding the Fourth Proportional to 128,664.08, 177,556.44 and 72,076.64

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Solution

The fourth proportional to 128,664.08, 177,556.44 and 72,076.64 is: 99,465.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,664.08 : 177,556.44 = 72,076.64 : x
  2. Step 2: Convert to fraction form
    128,664.08/177,556.44 = 72,076.64/x
  3. Step 3: Cross multiply
    128,664.08x = 177,556.44 × 72,076.64
  4. Step 4: Simplify right side
    128,664.08x = 12,797,671,605.56
  5. Step 5: Solve for x
    x = 12,797,671,605.56/128,664.08
  6. Step 6: Final answer
    x = 99,465.77

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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.