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Finding the Fourth Proportional to 72,862, 109,220.04 and 28,427.62

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Solution

The fourth proportional to 72,862, 109,220.04 and 28,427.62 is: 42,612.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,862 : 109,220.04 = 28,427.62 : x
  2. Step 2: Convert to fraction form
    72,862/109,220.04 = 28,427.62/x
  3. Step 3: Cross multiply
    72,862x = 109,220.04 × 28,427.62
  4. Step 4: Simplify right side
    72,862x = 3,104,865,793.50
  5. Step 5: Solve for x
    x = 3,104,865,793.50/72,862
  6. Step 6: Final answer
    x = 42,612.96

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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.