Home / 209,779.86-289,639.32-161,296.50

Finding the Fourth Proportional to 209,779.86, 289,639.32 and 161,296.50

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Solution

The fourth proportional to 209,779.86, 289,639.32 and 161,296.50 is: 222,699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,779.86 : 289,639.32 = 161,296.50 : x
  2. Step 2: Convert to fraction form
    209,779.86/289,639.32 = 161,296.50/x
  3. Step 3: Cross multiply
    209,779.86x = 289,639.32 × 161,296.50
  4. Step 4: Simplify right side
    209,779.86x = 46,717,808,578.38
  5. Step 5: Solve for x
    x = 46,717,808,578.38/209,779.86
  6. Step 6: Final answer
    x = 222,699.21

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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.