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Finding the Fourth Proportional to 216,688.77, 325,041.66 and 66,915.72

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Solution

The fourth proportional to 216,688.77, 325,041.66 and 66,915.72 is: 100,376.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,688.77 : 325,041.66 = 66,915.72 : x
  2. Step 2: Convert to fraction form
    216,688.77/325,041.66 = 66,915.72/x
  3. Step 3: Cross multiply
    216,688.77x = 325,041.66 × 66,915.72
  4. Step 4: Simplify right side
    216,688.77x = 21,750,396,708.90
  5. Step 5: Solve for x
    x = 21,750,396,708.90/216,688.77
  6. Step 6: Final answer
    x = 100,376.21

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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.