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Finding the Fourth Proportional to 100,515.68, 150,750.49 and 60,000.64

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Solution

The fourth proportional to 100,515.68, 150,750.49 and 60,000.64 is: 89,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,515.68 : 150,750.49 = 60,000.64 : x
  2. Step 2: Convert to fraction form
    100,515.68/150,750.49 = 60,000.64/x
  3. Step 3: Cross multiply
    100,515.68x = 150,750.49 × 60,000.64
  4. Step 4: Simplify right side
    100,515.68x = 9,045,125,880.31
  5. Step 5: Solve for x
    x = 9,045,125,880.31/100,515.68
  6. Step 6: Final answer
    x = 89,987.21

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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.