Home / 81,724.55-112,821.86-56,530.31

Finding the Fourth Proportional to 81,724.55, 112,821.86 and 56,530.31

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Solution

The fourth proportional to 81,724.55, 112,821.86 and 56,530.31 is: 78,040.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,724.55 : 112,821.86 = 56,530.31 : x
  2. Step 2: Convert to fraction form
    81,724.55/112,821.86 = 56,530.31/x
  3. Step 3: Cross multiply
    81,724.55x = 112,821.86 × 56,530.31
  4. Step 4: Simplify right side
    81,724.55x = 6,377,854,297.79
  5. Step 5: Solve for x
    x = 6,377,854,297.79/81,724.55
  6. Step 6: Final answer
    x = 78,040.87

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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.