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Finding the Fourth Proportional to 73,119.40, 100,905 and 39,585.40

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Solution

The fourth proportional to 73,119.40, 100,905 and 39,585.40 is: 54,627.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,119.40 : 100,905 = 39,585.40 : x
  2. Step 2: Convert to fraction form
    73,119.40/100,905 = 39,585.40/x
  3. Step 3: Cross multiply
    73,119.40x = 100,905 × 39,585.40
  4. Step 4: Simplify right side
    73,119.40x = 3,994,364,787
  5. Step 5: Solve for x
    x = 3,994,364,787/73,119.40
  6. Step 6: Final answer
    x = 54,627.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.