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Finding the Fourth Proportional to 72,195.60, 108,210.48 and 45,190.08

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Solution

The fourth proportional to 72,195.60, 108,210.48 and 45,190.08 is: 67,733.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.60 : 108,210.48 = 45,190.08 : x
  2. Step 2: Convert to fraction form
    72,195.60/108,210.48 = 45,190.08/x
  3. Step 3: Cross multiply
    72,195.60x = 108,210.48 × 45,190.08
  4. Step 4: Simplify right side
    72,195.60x = 4,890,040,248.04
  5. Step 5: Solve for x
    x = 4,890,040,248.04/72,195.60
  6. Step 6: Final answer
    x = 67,733.22

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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.