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Finding the Fourth Proportional to 71,671.76, 107,529.40 and 28,955.28

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Solution

The fourth proportional to 71,671.76, 107,529.40 and 28,955.28 is: 43,441.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.76 : 107,529.40 = 28,955.28 : x
  2. Step 2: Convert to fraction form
    71,671.76/107,529.40 = 28,955.28/x
  3. Step 3: Cross multiply
    71,671.76x = 107,529.40 × 28,955.28
  4. Step 4: Simplify right side
    71,671.76x = 3,113,543,885.23
  5. Step 5: Solve for x
    x = 3,113,543,885.23/71,671.76
  6. Step 6: Final answer
    x = 43,441.71

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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.