Home / 276,742.20-415,056.60-77,012.40

Finding the Fourth Proportional to 276,742.20, 415,056.60 and 77,012.40

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Solution

The fourth proportional to 276,742.20, 415,056.60 and 77,012.40 is: 115,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,742.20 : 415,056.60 = 77,012.40 : x
  2. Step 2: Convert to fraction form
    276,742.20/415,056.60 = 77,012.40/x
  3. Step 3: Cross multiply
    276,742.20x = 415,056.60 × 77,012.40
  4. Step 4: Simplify right side
    276,742.20x = 31,964,504,901.84
  5. Step 5: Solve for x
    x = 31,964,504,901.84/276,742.20
  6. Step 6: Final answer
    x = 115,502.82

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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.