Home / 85,400.97-128,106.12-35,486.10

Finding the Fourth Proportional to 85,400.97, 128,106.12 and 35,486.10

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Solution

The fourth proportional to 85,400.97, 128,106.12 and 35,486.10 is: 53,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,400.97 : 128,106.12 = 35,486.10 : x
  2. Step 2: Convert to fraction form
    85,400.97/128,106.12 = 35,486.10/x
  3. Step 3: Cross multiply
    85,400.97x = 128,106.12 × 35,486.10
  4. Step 4: Simplify right side
    85,400.97x = 4,545,986,584.93
  5. Step 5: Solve for x
    x = 4,545,986,584.93/85,400.97
  6. Step 6: Final answer
    x = 53,231.09

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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.