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Finding the Fourth Proportional to 124,628.60, 187,137.30 and 72,140.60

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Solution

The fourth proportional to 124,628.60, 187,137.30 and 72,140.60 is: 108,323.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,628.60 : 187,137.30 = 72,140.60 : x
  2. Step 2: Convert to fraction form
    124,628.60/187,137.30 = 72,140.60/x
  3. Step 3: Cross multiply
    124,628.60x = 187,137.30 × 72,140.60
  4. Step 4: Simplify right side
    124,628.60x = 13,500,197,104.38
  5. Step 5: Solve for x
    x = 13,500,197,104.38/124,628.60
  6. Step 6: Final answer
    x = 108,323.43

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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.