Home / 74,701.90-111,979.95-66,828.70

Finding the Fourth Proportional to 74,701.90, 111,979.95 and 66,828.70

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Solution

The fourth proportional to 74,701.90, 111,979.95 and 66,828.70 is: 100,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,701.90 : 111,979.95 = 66,828.70 : x
  2. Step 2: Convert to fraction form
    74,701.90/111,979.95 = 66,828.70/x
  3. Step 3: Cross multiply
    74,701.90x = 111,979.95 × 66,828.70
  4. Step 4: Simplify right side
    74,701.90x = 7,483,474,484.57
  5. Step 5: Solve for x
    x = 7,483,474,484.57/74,701.90
  6. Step 6: Final answer
    x = 100,177.83

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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.