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Finding the Fourth Proportional to 52,779.60, 79,102.20 and 21,579.60

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Solution

The fourth proportional to 52,779.60, 79,102.20 and 21,579.60 is: 32,341.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,779.60 : 79,102.20 = 21,579.60 : x
  2. Step 2: Convert to fraction form
    52,779.60/79,102.20 = 21,579.60/x
  3. Step 3: Cross multiply
    52,779.60x = 79,102.20 × 21,579.60
  4. Step 4: Simplify right side
    52,779.60x = 1,706,993,835.12
  5. Step 5: Solve for x
    x = 1,706,993,835.12/52,779.60
  6. Step 6: Final answer
    x = 32,341.92

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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.