Home / 81,409.23-122,115.47-53,507.16

Finding the Fourth Proportional to 81,409.23, 122,115.47 and 53,507.16

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Solution

The fourth proportional to 81,409.23, 122,115.47 and 53,507.16 is: 80,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,409.23 : 122,115.47 = 53,507.16 : x
  2. Step 2: Convert to fraction form
    81,409.23/122,115.47 = 53,507.16/x
  3. Step 3: Cross multiply
    81,409.23x = 122,115.47 × 53,507.16
  4. Step 4: Simplify right side
    81,409.23x = 6,534,051,724.23
  5. Step 5: Solve for x
    x = 6,534,051,724.23/81,409.23
  6. Step 6: Final answer
    x = 80,261.80

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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.