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Finding the Fourth Proportional to 216,689.77, 325,043.16 and 66,916.72

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Solution

The fourth proportional to 216,689.77, 325,043.16 and 66,916.72 is: 100,377.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,689.77 : 325,043.16 = 66,916.72 : x
  2. Step 2: Convert to fraction form
    216,689.77/325,043.16 = 66,916.72/x
  3. Step 3: Cross multiply
    216,689.77x = 325,043.16 × 66,916.72
  4. Step 4: Simplify right side
    216,689.77x = 21,750,822,125.64
  5. Step 5: Solve for x
    x = 21,750,822,125.64/216,689.77
  6. Step 6: Final answer
    x = 100,377.71

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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.