Home / 81,664.50-122,528.44-31,779.64

Finding the Fourth Proportional to 81,664.50, 122,528.44 and 31,779.64

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Solution

The fourth proportional to 81,664.50, 122,528.44 and 31,779.64 is: 47,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,664.50 : 122,528.44 = 31,779.64 : x
  2. Step 2: Convert to fraction form
    81,664.50/122,528.44 = 31,779.64/x
  3. Step 3: Cross multiply
    81,664.50x = 122,528.44 × 31,779.64
  4. Step 4: Simplify right side
    81,664.50x = 3,893,909,100.32
  5. Step 5: Solve for x
    x = 3,893,909,100.32/81,664.50
  6. Step 6: Final answer
    x = 47,681.78

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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.