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Finding the Fourth Proportional to 103,345.20, 154,672.20 and 72,241.20

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Solution

The fourth proportional to 103,345.20, 154,672.20 and 72,241.20 is: 108,120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,345.20 : 154,672.20 = 72,241.20 : x
  2. Step 2: Convert to fraction form
    103,345.20/154,672.20 = 72,241.20/x
  3. Step 3: Cross multiply
    103,345.20x = 154,672.20 × 72,241.20
  4. Step 4: Simplify right side
    103,345.20x = 11,173,705,334.64
  5. Step 5: Solve for x
    x = 11,173,705,334.64/103,345.20
  6. Step 6: Final answer
    x = 108,120.22

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1.5x scale

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.