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Finding the Fourth Proportional to 103,314.90, 154,972.35 and 69,853.80

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Solution

The fourth proportional to 103,314.90, 154,972.35 and 69,853.80 is: 104,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,314.90 : 154,972.35 = 69,853.80 : x
  2. Step 2: Convert to fraction form
    103,314.90/154,972.35 = 69,853.80/x
  3. Step 3: Cross multiply
    103,314.90x = 154,972.35 × 69,853.80
  4. Step 4: Simplify right side
    103,314.90x = 10,825,407,542.43
  5. Step 5: Solve for x
    x = 10,825,407,542.43/103,314.90
  6. Step 6: Final answer
    x = 104,780.70

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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.