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Finding the Fourth Proportional to 96,811.60, 145,217.40 and 72,235.60

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Solution

The fourth proportional to 96,811.60, 145,217.40 and 72,235.60 is: 108,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,811.60 : 145,217.40 = 72,235.60 : x
  2. Step 2: Convert to fraction form
    96,811.60/145,217.40 = 72,235.60/x
  3. Step 3: Cross multiply
    96,811.60x = 145,217.40 × 72,235.60
  4. Step 4: Simplify right side
    96,811.60x = 10,489,866,019.44
  5. Step 5: Solve for x
    x = 10,489,866,019.44/96,811.60
  6. Step 6: Final answer
    x = 108,353.40

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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.