Home / 81,801.12-122,767.30-42,369.51

Finding the Fourth Proportional to 81,801.12, 122,767.30 and 42,369.51

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Solution

The fourth proportional to 81,801.12, 122,767.30 and 42,369.51 is: 63,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,801.12 : 122,767.30 = 42,369.51 : x
  2. Step 2: Convert to fraction form
    81,801.12/122,767.30 = 42,369.51/x
  3. Step 3: Cross multiply
    81,801.12x = 122,767.30 × 42,369.51
  4. Step 4: Simplify right side
    81,801.12x = 5,201,590,858.36
  5. Step 5: Solve for x
    x = 5,201,590,858.36/81,801.12
  6. Step 6: Final answer
    x = 63,588.26

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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.