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Finding the Fourth Proportional to 64,021.86, 96,081.80 and 28,986.12

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Solution

The fourth proportional to 64,021.86, 96,081.80 and 28,986.12 is: 43,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,021.86 : 96,081.80 = 28,986.12 : x
  2. Step 2: Convert to fraction form
    64,021.86/96,081.80 = 28,986.12/x
  3. Step 3: Cross multiply
    64,021.86x = 96,081.80 × 28,986.12
  4. Step 4: Simplify right side
    64,021.86x = 2,785,038,439.69
  5. Step 5: Solve for x
    x = 2,785,038,439.69/64,021.86
  6. Step 6: Final answer
    x = 43,501.37

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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.