Home / 79,890.48-119,837.54-20,728.48

Finding the Fourth Proportional to 79,890.48, 119,837.54 and 20,728.48

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Solution

The fourth proportional to 79,890.48, 119,837.54 and 20,728.48 is: 31,093.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890.48 : 119,837.54 = 20,728.48 : x
  2. Step 2: Convert to fraction form
    79,890.48/119,837.54 = 20,728.48/x
  3. Step 3: Cross multiply
    79,890.48x = 119,837.54 × 20,728.48
  4. Step 4: Simplify right side
    79,890.48x = 2,484,050,051.14
  5. Step 5: Solve for x
    x = 2,484,050,051.14/79,890.48
  6. Step 6: Final answer
    x = 31,093.19

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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.