Home / 128,125.16-192,078.39-90,567.08

Finding the Fourth Proportional to 128,125.16, 192,078.39 and 90,567.08

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Solution

The fourth proportional to 128,125.16, 192,078.39 and 90,567.08 is: 135,773.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.16 : 192,078.39 = 90,567.08 : x
  2. Step 2: Convert to fraction form
    128,125.16/192,078.39 = 90,567.08/x
  3. Step 3: Cross multiply
    128,125.16x = 192,078.39 × 90,567.08
  4. Step 4: Simplify right side
    128,125.16x = 17,395,978,913.40
  5. Step 5: Solve for x
    x = 17,395,978,913.40/128,125.16
  6. Step 6: Final answer
    x = 135,773.32

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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.