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Finding the Fourth Proportional to 64,389.60, 96,843.60 and 57,650.40

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Solution

The fourth proportional to 64,389.60, 96,843.60 and 57,650.40 is: 86,707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,389.60 : 96,843.60 = 57,650.40 : x
  2. Step 2: Convert to fraction form
    64,389.60/96,843.60 = 57,650.40/x
  3. Step 3: Cross multiply
    64,389.60x = 96,843.60 × 57,650.40
  4. Step 4: Simplify right side
    64,389.60x = 5,583,072,277.44
  5. Step 5: Solve for x
    x = 5,583,072,277.44/64,389.60
  6. Step 6: Final answer
    x = 86,707.67

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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.