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Finding the Fourth Proportional to 72,630.60, 108,984.60 and 28,258.80

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Solution

The fourth proportional to 72,630.60, 108,984.60 and 28,258.80 is: 42,403.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.60 : 108,984.60 = 28,258.80 : x
  2. Step 2: Convert to fraction form
    72,630.60/108,984.60 = 28,258.80/x
  3. Step 3: Cross multiply
    72,630.60x = 108,984.60 × 28,258.80
  4. Step 4: Simplify right side
    72,630.60x = 3,079,774,014.48
  5. Step 5: Solve for x
    x = 3,079,774,014.48/72,630.60
  6. Step 6: Final answer
    x = 42,403.26

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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.