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Finding the Fourth Proportional to 53,321.76, 79,858.08 and 42,153.44

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Solution

The fourth proportional to 53,321.76, 79,858.08 and 42,153.44 is: 63,131.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,321.76 : 79,858.08 = 42,153.44 : x
  2. Step 2: Convert to fraction form
    53,321.76/79,858.08 = 42,153.44/x
  3. Step 3: Cross multiply
    53,321.76x = 79,858.08 × 42,153.44
  4. Step 4: Simplify right side
    53,321.76x = 3,366,292,783.80
  5. Step 5: Solve for x
    x = 3,366,292,783.80/53,321.76
  6. Step 6: Final answer
    x = 63,131.69

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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.