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Finding the Fourth Proportional to 84,676.76, 127,015.17 and 31,387.06

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Solution

The fourth proportional to 84,676.76, 127,015.17 and 31,387.06 is: 47,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,676.76 : 127,015.17 = 31,387.06 : x
  2. Step 2: Convert to fraction form
    84,676.76/127,015.17 = 31,387.06/x
  3. Step 3: Cross multiply
    84,676.76x = 127,015.17 × 31,387.06
  4. Step 4: Simplify right side
    84,676.76x = 3,986,632,761.70
  5. Step 5: Solve for x
    x = 3,986,632,761.70/84,676.76
  6. Step 6: Final answer
    x = 47,080.60

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1.5x scale

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.