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Finding the Fourth Proportional to 72,779.04, 109,163.64 and 28,397.52

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Solution

The fourth proportional to 72,779.04, 109,163.64 and 28,397.52 is: 42,594.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,779.04 : 109,163.64 = 28,397.52 : x
  2. Step 2: Convert to fraction form
    72,779.04/109,163.64 = 28,397.52/x
  3. Step 3: Cross multiply
    72,779.04x = 109,163.64 × 28,397.52
  4. Step 4: Simplify right side
    72,779.04x = 3,099,976,650.17
  5. Step 5: Solve for x
    x = 3,099,976,650.17/72,779.04
  6. Step 6: Final answer
    x = 42,594.36

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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.