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Finding the Fourth Proportional to 71,673.76, 107,532.40 and 28,957.28

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Solution

The fourth proportional to 71,673.76, 107,532.40 and 28,957.28 is: 43,444.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,673.76 : 107,532.40 = 28,957.28 : x
  2. Step 2: Convert to fraction form
    71,673.76/107,532.40 = 28,957.28/x
  3. Step 3: Cross multiply
    71,673.76x = 107,532.40 × 28,957.28
  4. Step 4: Simplify right side
    71,673.76x = 3,113,845,815.87
  5. Step 5: Solve for x
    x = 3,113,845,815.87/71,673.76
  6. Step 6: Final answer
    x = 43,444.71

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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.