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Finding the Fourth Proportional to 143,962.40, 215,846.40 and 76,505.60

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Solution

The fourth proportional to 143,962.40, 215,846.40 and 76,505.60 is: 114,706.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,962.40 : 215,846.40 = 76,505.60 : x
  2. Step 2: Convert to fraction form
    143,962.40/215,846.40 = 76,505.60/x
  3. Step 3: Cross multiply
    143,962.40x = 215,846.40 × 76,505.60
  4. Step 4: Simplify right side
    143,962.40x = 16,513,458,339.84
  5. Step 5: Solve for x
    x = 16,513,458,339.84/143,962.40
  6. Step 6: Final answer
    x = 114,706.75

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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.