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Finding the Fourth Proportional to 117,894.48, 162,646.28 and 72,558.78

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Solution

The fourth proportional to 117,894.48, 162,646.28 and 72,558.78 is: 100,101.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,894.48 : 162,646.28 = 72,558.78 : x
  2. Step 2: Convert to fraction form
    117,894.48/162,646.28 = 72,558.78/x
  3. Step 3: Cross multiply
    117,894.48x = 162,646.28 × 72,558.78
  4. Step 4: Simplify right side
    117,894.48x = 11,801,415,648.34
  5. Step 5: Solve for x
    x = 11,801,415,648.34/117,894.48
  6. Step 6: Final answer
    x = 100,101.51

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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.