Home / 74,719.70-111,981.15-54,905.30

Finding the Fourth Proportional to 74,719.70, 111,981.15 and 54,905.30

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Solution

The fourth proportional to 74,719.70, 111,981.15 and 54,905.30 is: 82,285.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,719.70 : 111,981.15 = 54,905.30 : x
  2. Step 2: Convert to fraction form
    74,719.70/111,981.15 = 54,905.30/x
  3. Step 3: Cross multiply
    74,719.70x = 111,981.15 × 54,905.30
  4. Step 4: Simplify right side
    74,719.70x = 6,148,358,635.10
  5. Step 5: Solve for x
    x = 6,148,358,635.10/74,719.70
  6. Step 6: Final answer
    x = 82,285.64

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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.