Home / 81,988.27-122,900.19-28,638.83

Finding the Fourth Proportional to 81,988.27, 122,900.19 and 28,638.83

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Solution

The fourth proportional to 81,988.27, 122,900.19 and 28,638.83 is: 42,929.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,988.27 : 122,900.19 = 28,638.83 : x
  2. Step 2: Convert to fraction form
    81,988.27/122,900.19 = 28,638.83/x
  3. Step 3: Cross multiply
    81,988.27x = 122,900.19 × 28,638.83
  4. Step 4: Simplify right side
    81,988.27x = 3,519,717,848.23
  5. Step 5: Solve for x
    x = 3,519,717,848.23/81,988.27
  6. Step 6: Final answer
    x = 42,929.53

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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.