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Finding the Fourth Proportional to 216,689.39, 325,068.72 and 66,894.47

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Solution

The fourth proportional to 216,689.39, 325,068.72 and 66,894.47 is: 100,352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,689.39 : 325,068.72 = 66,894.47 : x
  2. Step 2: Convert to fraction form
    216,689.39/325,068.72 = 66,894.47/x
  3. Step 3: Cross multiply
    216,689.39x = 325,068.72 × 66,894.47
  4. Step 4: Simplify right side
    216,689.39x = 21,745,299,737.98
  5. Step 5: Solve for x
    x = 21,745,299,737.98/216,689.39
  6. Step 6: Final answer
    x = 100,352.40

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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.