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Finding the Fourth Proportional to 93,422.70, 140,134.05 and 86,205.60

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Solution

The fourth proportional to 93,422.70, 140,134.05 and 86,205.60 is: 129,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,422.70 : 140,134.05 = 86,205.60 : x
  2. Step 2: Convert to fraction form
    93,422.70/140,134.05 = 86,205.60/x
  3. Step 3: Cross multiply
    93,422.70x = 140,134.05 × 86,205.60
  4. Step 4: Simplify right side
    93,422.70x = 12,080,339,860.68
  5. Step 5: Solve for x
    x = 12,080,339,860.68/93,422.70
  6. Step 6: Final answer
    x = 129,308.40

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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.