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Finding the Fourth Proportional to 53,140.61, 79,708.61 and 19,860.96

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Solution

The fourth proportional to 53,140.61, 79,708.61 and 19,860.96 is: 29,790.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,140.61 : 79,708.61 = 19,860.96 : x
  2. Step 2: Convert to fraction form
    53,140.61/79,708.61 = 19,860.96/x
  3. Step 3: Cross multiply
    53,140.61x = 79,708.61 × 19,860.96
  4. Step 4: Simplify right side
    53,140.61x = 1,583,089,863.43
  5. Step 5: Solve for x
    x = 1,583,089,863.43/53,140.61
  6. Step 6: Final answer
    x = 29,790.58

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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.