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Finding the Fourth Proportional to 217,118.88, 325,639.28 and 76,878.24

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Solution

The fourth proportional to 217,118.88, 325,639.28 and 76,878.24 is: 115,303.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,118.88 : 325,639.28 = 76,878.24 : x
  2. Step 2: Convert to fraction form
    217,118.88/325,639.28 = 76,878.24/x
  3. Step 3: Cross multiply
    217,118.88x = 325,639.28 × 76,878.24
  4. Step 4: Simplify right side
    217,118.88x = 25,034,574,721.27
  5. Step 5: Solve for x
    x = 25,034,574,721.27/217,118.88
  6. Step 6: Final answer
    x = 115,303.54

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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.