Home / 81,051.93-121,328.78-69,094.51

Finding the Fourth Proportional to 81,051.93, 121,328.78 and 69,094.51

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Solution

The fourth proportional to 81,051.93, 121,328.78 and 69,094.51 is: 103,429.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,051.93 : 121,328.78 = 69,094.51 : x
  2. Step 2: Convert to fraction form
    81,051.93/121,328.78 = 69,094.51/x
  3. Step 3: Cross multiply
    81,051.93x = 121,328.78 × 69,094.51
  4. Step 4: Simplify right side
    81,051.93x = 8,383,151,954.20
  5. Step 5: Solve for x
    x = 8,383,151,954.20/81,051.93
  6. Step 6: Final answer
    x = 103,429.39

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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.