Home / 105,579.86-145,699.76-57,181.55

Finding the Fourth Proportional to 105,579.86, 145,699.76 and 57,181.55

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Solution

The fourth proportional to 105,579.86, 145,699.76 and 57,181.55 is: 78,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,579.86 : 145,699.76 = 57,181.55 : x
  2. Step 2: Convert to fraction form
    105,579.86/145,699.76 = 57,181.55/x
  3. Step 3: Cross multiply
    105,579.86x = 145,699.76 × 57,181.55
  4. Step 4: Simplify right side
    105,579.86x = 8,331,337,525.88
  5. Step 5: Solve for x
    x = 8,331,337,525.88/105,579.86
  6. Step 6: Final answer
    x = 78,910.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.