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Finding the Fourth Proportional to 213,481.68, 319,779.63 and 124,465.20

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Solution

The fourth proportional to 213,481.68, 319,779.63 and 124,465.20 is: 186,439.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,481.68 : 319,779.63 = 124,465.20 : x
  2. Step 2: Convert to fraction form
    213,481.68/319,779.63 = 124,465.20/x
  3. Step 3: Cross multiply
    213,481.68x = 319,779.63 × 124,465.20
  4. Step 4: Simplify right side
    213,481.68x = 39,801,435,603.88
  5. Step 5: Solve for x
    x = 39,801,435,603.88/213,481.68
  6. Step 6: Final answer
    x = 186,439.58

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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.