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Finding the Fourth Proportional to 216,718.08, 325,108.32 and 66,971.52

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Solution

The fourth proportional to 216,718.08, 325,108.32 and 66,971.52 is: 100,466.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,718.08 : 325,108.32 = 66,971.52 : x
  2. Step 2: Convert to fraction form
    216,718.08/325,108.32 = 66,971.52/x
  3. Step 3: Cross multiply
    216,718.08x = 325,108.32 × 66,971.52
  4. Step 4: Simplify right side
    216,718.08x = 21,772,998,355.05
  5. Step 5: Solve for x
    x = 21,772,998,355.05/216,718.08
  6. Step 6: Final answer
    x = 100,466.92

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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.