Home / 128,148.90-192,226.39-39,403.21

Finding the Fourth Proportional to 128,148.90, 192,226.39 and 39,403.21

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Solution

The fourth proportional to 128,148.90, 192,226.39 and 39,403.21 is: 59,105.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,148.90 : 192,226.39 = 39,403.21 : x
  2. Step 2: Convert to fraction form
    128,148.90/192,226.39 = 39,403.21/x
  3. Step 3: Cross multiply
    128,148.90x = 192,226.39 × 39,403.21
  4. Step 4: Simplify right side
    128,148.90x = 7,574,336,233.64
  5. Step 5: Solve for x
    x = 7,574,336,233.64/128,148.90
  6. Step 6: Final answer
    x = 59,105.75

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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.