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Finding the Fourth Proportional to 64,274.21, 88,728.70 and 42,799.69

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Solution

The fourth proportional to 64,274.21, 88,728.70 and 42,799.69 is: 59,083.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,274.21 : 88,728.70 = 42,799.69 : x
  2. Step 2: Convert to fraction form
    64,274.21/88,728.70 = 42,799.69/x
  3. Step 3: Cross multiply
    64,274.21x = 88,728.70 × 42,799.69
  4. Step 4: Simplify right side
    64,274.21x = 3,797,560,938.26
  5. Step 5: Solve for x
    x = 3,797,560,938.26/64,274.21
  6. Step 6: Final answer
    x = 59,083.74

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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.