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Finding the Fourth Proportional to 160,697.48, 221,764.16 and 89,078.72

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Solution

The fourth proportional to 160,697.48, 221,764.16 and 89,078.72 is: 122,929.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,697.48 : 221,764.16 = 89,078.72 : x
  2. Step 2: Convert to fraction form
    160,697.48/221,764.16 = 89,078.72/x
  3. Step 3: Cross multiply
    160,697.48x = 221,764.16 × 89,078.72
  4. Step 4: Simplify right side
    160,697.48x = 19,754,467,514.68
  5. Step 5: Solve for x
    x = 19,754,467,514.68/160,697.48
  6. Step 6: Final answer
    x = 122,929.54

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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.