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Finding the Fourth Proportional to 101,628.99, 140,271.30 and 67,638.92

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Solution

The fourth proportional to 101,628.99, 140,271.30 and 67,638.92 is: 93,357.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,628.99 : 140,271.30 = 67,638.92 : x
  2. Step 2: Convert to fraction form
    101,628.99/140,271.30 = 67,638.92/x
  3. Step 3: Cross multiply
    101,628.99x = 140,271.30 × 67,638.92
  4. Step 4: Simplify right side
    101,628.99x = 9,487,798,537.64
  5. Step 5: Solve for x
    x = 9,487,798,537.64/101,628.99
  6. Step 6: Final answer
    x = 93,357.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.