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Finding the Fourth Proportional to 66,990.36, 100,477.80 and 35,387.76

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Solution

The fourth proportional to 66,990.36, 100,477.80 and 35,387.76 is: 53,077.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990.36 : 100,477.80 = 35,387.76 : x
  2. Step 2: Convert to fraction form
    66,990.36/100,477.80 = 35,387.76/x
  3. Step 3: Cross multiply
    66,990.36x = 100,477.80 × 35,387.76
  4. Step 4: Simplify right side
    66,990.36x = 3,555,684,271.73
  5. Step 5: Solve for x
    x = 3,555,684,271.73/66,990.36
  6. Step 6: Final answer
    x = 53,077.55

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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.