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Finding the Fourth Proportional to 84,851.40, 127,272.78 and 28,718.40

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Solution

The fourth proportional to 84,851.40, 127,272.78 and 28,718.40 is: 43,076.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,851.40 : 127,272.78 = 28,718.40 : x
  2. Step 2: Convert to fraction form
    84,851.40/127,272.78 = 28,718.40/x
  3. Step 3: Cross multiply
    84,851.40x = 127,272.78 × 28,718.40
  4. Step 4: Simplify right side
    84,851.40x = 3,655,070,605.15
  5. Step 5: Solve for x
    x = 3,655,070,605.15/84,851.40
  6. Step 6: Final answer
    x = 43,076.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.