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Finding the Fourth Proportional to 57,978.99, 86,976.68 and 18,526.87

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Solution

The fourth proportional to 57,978.99, 86,976.68 and 18,526.87 is: 27,792.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,978.99 : 86,976.68 = 18,526.87 : x
  2. Step 2: Convert to fraction form
    57,978.99/86,976.68 = 18,526.87/x
  3. Step 3: Cross multiply
    57,978.99x = 86,976.68 × 18,526.87
  4. Step 4: Simplify right side
    57,978.99x = 1,611,405,550.76
  5. Step 5: Solve for x
    x = 1,611,405,550.76/57,978.99
  6. Step 6: Final answer
    x = 27,792.92

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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.