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Finding the Fourth Proportional to 112,644.76, 155,289.54 and 76,788.76

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Solution

The fourth proportional to 112,644.76, 155,289.54 and 76,788.76 is: 105,859.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,644.76 : 155,289.54 = 76,788.76 : x
  2. Step 2: Convert to fraction form
    112,644.76/155,289.54 = 76,788.76/x
  3. Step 3: Cross multiply
    112,644.76x = 155,289.54 × 76,788.76
  4. Step 4: Simplify right side
    112,644.76x = 11,924,491,217.57
  5. Step 5: Solve for x
    x = 11,924,491,217.57/112,644.76
  6. Step 6: Final answer
    x = 105,859.26

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1.5x scale

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.