Home / 209,681.45-289,398.32-123,635.30

Finding the Fourth Proportional to 209,681.45, 289,398.32 and 123,635.30

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Solution

The fourth proportional to 209,681.45, 289,398.32 and 123,635.30 is: 170,639.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,681.45 : 289,398.32 = 123,635.30 : x
  2. Step 2: Convert to fraction form
    209,681.45/289,398.32 = 123,635.30/x
  3. Step 3: Cross multiply
    209,681.45x = 289,398.32 × 123,635.30
  4. Step 4: Simplify right side
    209,681.45x = 35,779,848,112.70
  5. Step 5: Solve for x
    x = 35,779,848,112.70/209,681.45
  6. Step 6: Final answer
    x = 170,639.07

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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.