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Finding the Fourth Proportional to 216,912.30, 325,368.45 and 140,804.70

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Solution

The fourth proportional to 216,912.30, 325,368.45 and 140,804.70 is: 211,207.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,912.30 : 325,368.45 = 140,804.70 : x
  2. Step 2: Convert to fraction form
    216,912.30/325,368.45 = 140,804.70/x
  3. Step 3: Cross multiply
    216,912.30x = 325,368.45 × 140,804.70
  4. Step 4: Simplify right side
    216,912.30x = 45,813,406,991.72
  5. Step 5: Solve for x
    x = 45,813,406,991.72/216,912.30
  6. Step 6: Final answer
    x = 211,207.05

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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.