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Finding the Fourth Proportional to 72,475.10, 108,699.93 and 19,167.60

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Solution

The fourth proportional to 72,475.10, 108,699.93 and 19,167.60 is: 28,748.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,475.10 : 108,699.93 = 19,167.60 : x
  2. Step 2: Convert to fraction form
    72,475.10/108,699.93 = 19,167.60/x
  3. Step 3: Cross multiply
    72,475.10x = 108,699.93 × 19,167.60
  4. Step 4: Simplify right side
    72,475.10x = 2,083,516,778.27
  5. Step 5: Solve for x
    x = 2,083,516,778.27/72,475.10
  6. Step 6: Final answer
    x = 28,748.04

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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.