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Finding the Fourth Proportional to 67,615.58, 101,424.90 and 20,868.50

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Solution

The fourth proportional to 67,615.58, 101,424.90 and 20,868.50 is: 31,303.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,615.58 : 101,424.90 = 20,868.50 : x
  2. Step 2: Convert to fraction form
    67,615.58/101,424.90 = 20,868.50/x
  3. Step 3: Cross multiply
    67,615.58x = 101,424.90 × 20,868.50
  4. Step 4: Simplify right side
    67,615.58x = 2,116,585,525.65
  5. Step 5: Solve for x
    x = 2,116,585,525.65/67,615.58
  6. Step 6: Final answer
    x = 31,303.22

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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.