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Finding the Fourth Proportional to 53,190.47, 79,809.92 and 19,913.12

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Solution

The fourth proportional to 53,190.47, 79,809.92 and 19,913.12 is: 29,878.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,190.47 : 79,809.92 = 19,913.12 : x
  2. Step 2: Convert to fraction form
    53,190.47/79,809.92 = 19,913.12/x
  3. Step 3: Cross multiply
    53,190.47x = 79,809.92 × 19,913.12
  4. Step 4: Simplify right side
    53,190.47x = 1,589,264,688.78
  5. Step 5: Solve for x
    x = 1,589,264,688.78/53,190.47
  6. Step 6: Final answer
    x = 29,878.75

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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.