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Finding the Fourth Proportional to 216,806.40, 325,128.69 and 74,611.89

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Solution

The fourth proportional to 216,806.40, 325,128.69 and 74,611.89 is: 111,889.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,806.40 : 325,128.69 = 74,611.89 : x
  2. Step 2: Convert to fraction form
    216,806.40/325,128.69 = 74,611.89/x
  3. Step 3: Cross multiply
    216,806.40x = 325,128.69 × 74,611.89
  4. Step 4: Simplify right side
    216,806.40x = 24,258,466,054.12
  5. Step 5: Solve for x
    x = 24,258,466,054.12/216,806.40
  6. Step 6: Final answer
    x = 111,889.99

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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.