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Finding the Fourth Proportional to 72,984.67, 109,397.03 and 28,562.60

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Solution

The fourth proportional to 72,984.67, 109,397.03 and 28,562.60 is: 42,812.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984.67 : 109,397.03 = 28,562.60 : x
  2. Step 2: Convert to fraction form
    72,984.67/109,397.03 = 28,562.60/x
  3. Step 3: Cross multiply
    72,984.67x = 109,397.03 × 28,562.60
  4. Step 4: Simplify right side
    72,984.67x = 3,124,663,609.08
  5. Step 5: Solve for x
    x = 3,124,663,609.08/72,984.67
  6. Step 6: Final answer
    x = 42,812.60

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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.