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Finding the Fourth Proportional to 72,851.69, 100,542.53 and 42,635.21

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Solution

The fourth proportional to 72,851.69, 100,542.53 and 42,635.21 is: 58,840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,851.69 : 100,542.53 = 42,635.21 : x
  2. Step 2: Convert to fraction form
    72,851.69/100,542.53 = 42,635.21/x
  3. Step 3: Cross multiply
    72,851.69x = 100,542.53 × 42,635.21
  4. Step 4: Simplify right side
    72,851.69x = 4,286,651,880.48
  5. Step 5: Solve for x
    x = 4,286,651,880.48/72,851.69
  6. Step 6: Final answer
    x = 58,840.80

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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.