Home / 217,019.20-325,117.32-128,007.76

Finding the Fourth Proportional to 217,019.20, 325,117.32 and 128,007.76

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Solution

The fourth proportional to 217,019.20, 325,117.32 and 128,007.76 is: 191,768.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,019.20 : 325,117.32 = 128,007.76 : x
  2. Step 2: Convert to fraction form
    217,019.20/325,117.32 = 128,007.76/x
  3. Step 3: Cross multiply
    217,019.20x = 325,117.32 × 128,007.76
  4. Step 4: Simplify right side
    217,019.20x = 41,617,539,870.40
  5. Step 5: Solve for x
    x = 41,617,539,870.40/217,019.20
  6. Step 6: Final answer
    x = 191,768.93

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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.