Home / 208,028.91-312,258.74-128,124.44

Finding the Fourth Proportional to 208,028.91, 312,258.74 and 128,124.44

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Solution

The fourth proportional to 208,028.91, 312,258.74 and 128,124.44 is: 192,319.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,028.91 : 312,258.74 = 128,124.44 : x
  2. Step 2: Convert to fraction form
    208,028.91/312,258.74 = 128,124.44/x
  3. Step 3: Cross multiply
    208,028.91x = 312,258.74 × 128,124.44
  4. Step 4: Simplify right side
    208,028.91x = 40,007,973,995.69
  5. Step 5: Solve for x
    x = 40,007,973,995.69/208,028.91
  6. Step 6: Final answer
    x = 192,319.30

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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.