Home / 81,073.31-121,667.37-28,486.89

Finding the Fourth Proportional to 81,073.31, 121,667.37 and 28,486.89

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Solution

The fourth proportional to 81,073.31, 121,667.37 and 28,486.89 is: 42,750.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,073.31 : 121,667.37 = 28,486.89 : x
  2. Step 2: Convert to fraction form
    81,073.31/121,667.37 = 28,486.89/x
  3. Step 3: Cross multiply
    81,073.31x = 121,667.37 × 28,486.89
  4. Step 4: Simplify right side
    81,073.31x = 3,465,924,878.95
  5. Step 5: Solve for x
    x = 3,465,924,878.95/81,073.31
  6. Step 6: Final answer
    x = 42,750.51

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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.