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Finding the Fourth Proportional to 124,588, 171,931.60 and 79,876

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Solution

The fourth proportional to 124,588, 171,931.60 and 79,876 is: 110,228.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,588 : 171,931.60 = 79,876 : x
  2. Step 2: Convert to fraction form
    124,588/171,931.60 = 79,876/x
  3. Step 3: Cross multiply
    124,588x = 171,931.60 × 79,876
  4. Step 4: Simplify right side
    124,588x = 13,733,208,481.60
  5. Step 5: Solve for x
    x = 13,733,208,481.60/124,588
  6. Step 6: Final answer
    x = 110,228.98

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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.