Home / 81,278.10-121,876.83-25,866.90

Finding the Fourth Proportional to 81,278.10, 121,876.83 and 25,866.90

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Solution

The fourth proportional to 81,278.10, 121,876.83 and 25,866.90 is: 38,787.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.10 : 121,876.83 = 25,866.90 : x
  2. Step 2: Convert to fraction form
    81,278.10/121,876.83 = 25,866.90/x
  3. Step 3: Cross multiply
    81,278.10x = 121,876.83 × 25,866.90
  4. Step 4: Simplify right side
    81,278.10x = 3,152,575,773.93
  5. Step 5: Solve for x
    x = 3,152,575,773.93/81,278.10
  6. Step 6: Final answer
    x = 38,787.52

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1.5x scale

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.