Home / 201,921.18-278,653.15-111,280.47

Finding the Fourth Proportional to 201,921.18, 278,653.15 and 111,280.47

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Solution

The fourth proportional to 201,921.18, 278,653.15 and 111,280.47 is: 153,568.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,921.18 : 278,653.15 = 111,280.47 : x
  2. Step 2: Convert to fraction form
    201,921.18/278,653.15 = 111,280.47/x
  3. Step 3: Cross multiply
    201,921.18x = 278,653.15 × 111,280.47
  4. Step 4: Simplify right side
    201,921.18x = 31,008,653,498.98
  5. Step 5: Solve for x
    x = 31,008,653,498.98/201,921.18
  6. Step 6: Final answer
    x = 153,568.11

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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.