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Finding the Fourth Proportional to 93,722.70, 140,584.05 and 86,505.60

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Solution

The fourth proportional to 93,722.70, 140,584.05 and 86,505.60 is: 129,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,722.70 : 140,584.05 = 86,505.60 : x
  2. Step 2: Convert to fraction form
    93,722.70/140,584.05 = 86,505.60/x
  3. Step 3: Cross multiply
    93,722.70x = 140,584.05 × 86,505.60
  4. Step 4: Simplify right side
    93,722.70x = 12,161,307,595.68
  5. Step 5: Solve for x
    x = 12,161,307,595.68/93,722.70
  6. Step 6: Final answer
    x = 129,758.40

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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.