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Finding the Fourth Proportional to 53,145.60, 79,720.64 and 19,862.32

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Solution

The fourth proportional to 53,145.60, 79,720.64 and 19,862.32 is: 29,794.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,145.60 : 79,720.64 = 19,862.32 : x
  2. Step 2: Convert to fraction form
    53,145.60/79,720.64 = 19,862.32/x
  3. Step 3: Cross multiply
    53,145.60x = 79,720.64 × 19,862.32
  4. Step 4: Simplify right side
    53,145.60x = 1,583,436,862.28
  5. Step 5: Solve for x
    x = 1,583,436,862.28/53,145.60
  6. Step 6: Final answer
    x = 29,794.32

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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.