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Finding the Fourth Proportional to 141,321.79, 212,004.20 and 87,970.60

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Solution

The fourth proportional to 141,321.79, 212,004.20 and 87,970.60 is: 131,969.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,321.79 : 212,004.20 = 87,970.60 : x
  2. Step 2: Convert to fraction form
    141,321.79/212,004.20 = 87,970.60/x
  3. Step 3: Cross multiply
    141,321.79x = 212,004.20 × 87,970.60
  4. Step 4: Simplify right side
    141,321.79x = 18,650,136,676.52
  5. Step 5: Solve for x
    x = 18,650,136,676.52/141,321.79
  6. Step 6: Final answer
    x = 131,969.29

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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.