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Finding the Fourth Proportional to 107,012.40, 160,211.40 and 103,940.40

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Solution

The fourth proportional to 107,012.40, 160,211.40 and 103,940.40 is: 155,612.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,012.40 : 160,211.40 = 103,940.40 : x
  2. Step 2: Convert to fraction form
    107,012.40/160,211.40 = 103,940.40/x
  3. Step 3: Cross multiply
    107,012.40x = 160,211.40 × 103,940.40
  4. Step 4: Simplify right side
    107,012.40x = 16,652,437,000.56
  5. Step 5: Solve for x
    x = 16,652,437,000.56/107,012.40
  6. Step 6: Final answer
    x = 155,612.22

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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.