Home / 128,525.12-192,731.74-61,076.72

Finding the Fourth Proportional to 128,525.12, 192,731.74 and 61,076.72

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Solution

The fourth proportional to 128,525.12, 192,731.74 and 61,076.72 is: 91,588.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.12 : 192,731.74 = 61,076.72 : x
  2. Step 2: Convert to fraction form
    128,525.12/192,731.74 = 61,076.72/x
  3. Step 3: Cross multiply
    128,525.12x = 192,731.74 × 61,076.72
  4. Step 4: Simplify right side
    128,525.12x = 11,771,422,519.09
  5. Step 5: Solve for x
    x = 11,771,422,519.09/128,525.12
  6. Step 6: Final answer
    x = 91,588.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.