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Finding the Fourth Proportional to 58,485.76, 87,720.96 and 19,039.36

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Solution

The fourth proportional to 58,485.76, 87,720.96 and 19,039.36 is: 28,556.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,485.76 : 87,720.96 = 19,039.36 : x
  2. Step 2: Convert to fraction form
    58,485.76/87,720.96 = 19,039.36/x
  3. Step 3: Cross multiply
    58,485.76x = 87,720.96 × 19,039.36
  4. Step 4: Simplify right side
    58,485.76x = 1,670,150,936.99
  5. Step 5: Solve for x
    x = 1,670,150,936.99/58,485.76
  6. Step 6: Final answer
    x = 28,556.54

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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.