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Finding the Fourth Proportional to 81,015.76, 111,783.88 and 47,004.56

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Solution

The fourth proportional to 81,015.76, 111,783.88 and 47,004.56 is: 64,855.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.76 : 111,783.88 = 47,004.56 : x
  2. Step 2: Convert to fraction form
    81,015.76/111,783.88 = 47,004.56/x
  3. Step 3: Cross multiply
    81,015.76x = 111,783.88 × 47,004.56
  4. Step 4: Simplify right side
    81,015.76x = 5,254,352,094.49
  5. Step 5: Solve for x
    x = 5,254,352,094.49/81,015.76
  6. Step 6: Final answer
    x = 64,855.93

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1.5x scale

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.