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Finding the Fourth Proportional to 53,308.18, 79,978.25 and 15,869.56

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Solution

The fourth proportional to 53,308.18, 79,978.25 and 15,869.56 is: 23,809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,308.18 : 79,978.25 = 15,869.56 : x
  2. Step 2: Convert to fraction form
    53,308.18/79,978.25 = 15,869.56/x
  3. Step 3: Cross multiply
    53,308.18x = 79,978.25 × 15,869.56
  4. Step 4: Simplify right side
    53,308.18x = 1,269,219,637.07
  5. Step 5: Solve for x
    x = 1,269,219,637.07/53,308.18
  6. Step 6: Final answer
    x = 23,809.10

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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.