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Finding the Fourth Proportional to 84,741.20, 127,111.80 and 70,917.20

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Solution

The fourth proportional to 84,741.20, 127,111.80 and 70,917.20 is: 106,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,741.20 : 127,111.80 = 70,917.20 : x
  2. Step 2: Convert to fraction form
    84,741.20/127,111.80 = 70,917.20/x
  3. Step 3: Cross multiply
    84,741.20x = 127,111.80 × 70,917.20
  4. Step 4: Simplify right side
    84,741.20x = 9,014,412,942.96
  5. Step 5: Solve for x
    x = 9,014,412,942.96/84,741.20
  6. Step 6: Final answer
    x = 106,375.80

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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.