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Finding the Fourth Proportional to 86,804.76, 130,141.62 and 30,620.28

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Solution

The fourth proportional to 86,804.76, 130,141.62 and 30,620.28 is: 45,907.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,804.76 : 130,141.62 = 30,620.28 : x
  2. Step 2: Convert to fraction form
    86,804.76/130,141.62 = 30,620.28/x
  3. Step 3: Cross multiply
    86,804.76x = 130,141.62 × 30,620.28
  4. Step 4: Simplify right side
    86,804.76x = 3,984,972,844.05
  5. Step 5: Solve for x
    x = 3,984,972,844.05/86,804.76
  6. Step 6: Final answer
    x = 45,907.31

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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.