Home / 74,642.40-111,890.70-66,769.20

Finding the Fourth Proportional to 74,642.40, 111,890.70 and 66,769.20

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Solution

The fourth proportional to 74,642.40, 111,890.70 and 66,769.20 is: 100,088.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,642.40 : 111,890.70 = 66,769.20 : x
  2. Step 2: Convert to fraction form
    74,642.40/111,890.70 = 66,769.20/x
  3. Step 3: Cross multiply
    74,642.40x = 111,890.70 × 66,769.20
  4. Step 4: Simplify right side
    74,642.40x = 7,470,852,526.44
  5. Step 5: Solve for x
    x = 7,470,852,526.44/74,642.40
  6. Step 6: Final answer
    x = 100,088.59

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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.