Home / 201,986.51-278,743.28-111,345.72

Finding the Fourth Proportional to 201,986.51, 278,743.28 and 111,345.72

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Solution

The fourth proportional to 201,986.51, 278,743.28 and 111,345.72 is: 153,658.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,986.51 : 278,743.28 = 111,345.72 : x
  2. Step 2: Convert to fraction form
    201,986.51/278,743.28 = 111,345.72/x
  3. Step 3: Cross multiply
    201,986.51x = 278,743.28 × 111,345.72
  4. Step 4: Simplify right side
    201,986.51x = 31,036,871,485.13
  5. Step 5: Solve for x
    x = 31,036,871,485.13/201,986.51
  6. Step 6: Final answer
    x = 153,658.14

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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.