Home / 105,579.35-145,699.26-57,181.13

Finding the Fourth Proportional to 105,579.35, 145,699.26 and 57,181.13

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Solution

The fourth proportional to 105,579.35, 145,699.26 and 57,181.13 is: 78,909.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,579.35 : 145,699.26 = 57,181.13 : x
  2. Step 2: Convert to fraction form
    105,579.35/145,699.26 = 57,181.13/x
  3. Step 3: Cross multiply
    105,579.35x = 145,699.26 × 57,181.13
  4. Step 4: Simplify right side
    105,579.35x = 8,331,248,326.96
  5. Step 5: Solve for x
    x = 8,331,248,326.96/105,579.35
  6. Step 6: Final answer
    x = 78,909.83

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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.