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Finding the Fourth Proportional to 201,820.75, 278,512.71 and 116,987.02

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Solution

The fourth proportional to 201,820.75, 278,512.71 and 116,987.02 is: 161,442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,820.75 : 278,512.71 = 116,987.02 : x
  2. Step 2: Convert to fraction form
    201,820.75/278,512.71 = 116,987.02/x
  3. Step 3: Cross multiply
    201,820.75x = 278,512.71 × 116,987.02
  4. Step 4: Simplify right side
    201,820.75x = 32,582,371,975.02
  5. Step 5: Solve for x
    x = 32,582,371,975.02/201,820.75
  6. Step 6: Final answer
    x = 161,442.13

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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.