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Finding the Fourth Proportional to 145,364.40, 218,053.80 and 75,380.40

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Solution

The fourth proportional to 145,364.40, 218,053.80 and 75,380.40 is: 113,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,364.40 : 218,053.80 = 75,380.40 : x
  2. Step 2: Convert to fraction form
    145,364.40/218,053.80 = 75,380.40/x
  3. Step 3: Cross multiply
    145,364.40x = 218,053.80 × 75,380.40
  4. Step 4: Simplify right side
    145,364.40x = 16,436,982,665.52
  5. Step 5: Solve for x
    x = 16,436,982,665.52/145,364.40
  6. Step 6: Final answer
    x = 113,074.33

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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.