Home / 81,579.34-112,579.80-47,611.29

Finding the Fourth Proportional to 81,579.34, 112,579.80 and 47,611.29

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Solution

The fourth proportional to 81,579.34, 112,579.80 and 47,611.29 is: 65,703.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.34 : 112,579.80 = 47,611.29 : x
  2. Step 2: Convert to fraction form
    81,579.34/112,579.80 = 47,611.29/x
  3. Step 3: Cross multiply
    81,579.34x = 112,579.80 × 47,611.29
  4. Step 4: Simplify right side
    81,579.34x = 5,360,069,505.94
  5. Step 5: Solve for x
    x = 5,360,069,505.94/81,579.34
  6. Step 6: Final answer
    x = 65,703.76

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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.