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Finding the Fourth Proportional to 103,079.70, 154,619.55 and 71,586.90

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Solution

The fourth proportional to 103,079.70, 154,619.55 and 71,586.90 is: 107,380.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,079.70 : 154,619.55 = 71,586.90 : x
  2. Step 2: Convert to fraction form
    103,079.70/154,619.55 = 71,586.90/x
  3. Step 3: Cross multiply
    103,079.70x = 154,619.55 × 71,586.90
  4. Step 4: Simplify right side
    103,079.70x = 11,068,734,263.90
  5. Step 5: Solve for x
    x = 11,068,734,263.90/103,079.70
  6. Step 6: Final answer
    x = 107,380.35

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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.