Home / 81,237.60-121,856.40-49,744.80

Finding the Fourth Proportional to 81,237.60, 121,856.40 and 49,744.80

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Solution

The fourth proportional to 81,237.60, 121,856.40 and 49,744.80 is: 74,617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,237.60 : 121,856.40 = 49,744.80 : x
  2. Step 2: Convert to fraction form
    81,237.60/121,856.40 = 49,744.80/x
  3. Step 3: Cross multiply
    81,237.60x = 121,856.40 × 49,744.80
  4. Step 4: Simplify right side
    81,237.60x = 6,061,722,246.72
  5. Step 5: Solve for x
    x = 6,061,722,246.72/81,237.60
  6. Step 6: Final answer
    x = 74,617.20

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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.