Home / 84,579.93-126,871.96-28,420.86

Finding the Fourth Proportional to 84,579.93, 126,871.96 and 28,420.86

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Solution

The fourth proportional to 84,579.93, 126,871.96 and 28,420.86 is: 42,631.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,579.93 : 126,871.96 = 28,420.86 : x
  2. Step 2: Convert to fraction form
    84,579.93/126,871.96 = 28,420.86/x
  3. Step 3: Cross multiply
    84,579.93x = 126,871.96 × 28,420.86
  4. Step 4: Simplify right side
    84,579.93x = 3,605,809,507.67
  5. Step 5: Solve for x
    x = 3,605,809,507.67/84,579.93
  6. Step 6: Final answer
    x = 42,631.97

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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.