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Finding the Fourth Proportional to 245,890.90, 368,891.97 and 75,128.05

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Solution

The fourth proportional to 245,890.90, 368,891.97 and 75,128.05 is: 112,709.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,890.90 : 368,891.97 = 75,128.05 : x
  2. Step 2: Convert to fraction form
    245,890.90/368,891.97 = 75,128.05/x
  3. Step 3: Cross multiply
    245,890.90x = 368,891.97 × 75,128.05
  4. Step 4: Simplify right side
    245,890.90x = 27,714,134,366.76
  5. Step 5: Solve for x
    x = 27,714,134,366.76/245,890.90
  6. Step 6: Final answer
    x = 112,709.07

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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.