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Finding the Fourth Proportional to 72,851.70, 100,537.84 and 42,639.84

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Solution

The fourth proportional to 72,851.70, 100,537.84 and 42,639.84 is: 58,844.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,851.70 : 100,537.84 = 42,639.84 : x
  2. Step 2: Convert to fraction form
    72,851.70/100,537.84 = 42,639.84/x
  3. Step 3: Cross multiply
    72,851.70x = 100,537.84 × 42,639.84
  4. Step 4: Simplify right side
    72,851.70x = 4,286,917,156.36
  5. Step 5: Solve for x
    x = 4,286,917,156.36/72,851.70
  6. Step 6: Final answer
    x = 58,844.43

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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.