Home / 81,043.36-121,577.16-28,443.60

Finding the Fourth Proportional to 81,043.36, 121,577.16 and 28,443.60

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Solution

The fourth proportional to 81,043.36, 121,577.16 and 28,443.60 is: 42,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,043.36 : 121,577.16 = 28,443.60 : x
  2. Step 2: Convert to fraction form
    81,043.36/121,577.16 = 28,443.60/x
  3. Step 3: Cross multiply
    81,043.36x = 121,577.16 × 28,443.60
  4. Step 4: Simplify right side
    81,043.36x = 3,458,092,108.18
  5. Step 5: Solve for x
    x = 3,458,092,108.18/81,043.36
  6. Step 6: Final answer
    x = 42,669.65

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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.