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Finding the Fourth Proportional to 103,655.80, 155,408.88 and 40,422.34

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Solution

The fourth proportional to 103,655.80, 155,408.88 and 40,422.34 is: 60,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.80 : 155,408.88 = 40,422.34 : x
  2. Step 2: Convert to fraction form
    103,655.80/155,408.88 = 40,422.34/x
  3. Step 3: Cross multiply
    103,655.80x = 155,408.88 × 40,422.34
  4. Step 4: Simplify right side
    103,655.80x = 6,281,990,586.38
  5. Step 5: Solve for x
    x = 6,281,990,586.38/103,655.80
  6. Step 6: Final answer
    x = 60,604.33

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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.