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Finding the Fourth Proportional to 70,503.35, 105,730.38 and 28,372.49

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Solution

The fourth proportional to 70,503.35, 105,730.38 and 28,372.49 is: 42,548.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,503.35 : 105,730.38 = 28,372.49 : x
  2. Step 2: Convert to fraction form
    70,503.35/105,730.38 = 28,372.49/x
  3. Step 3: Cross multiply
    70,503.35x = 105,730.38 × 28,372.49
  4. Step 4: Simplify right side
    70,503.35x = 2,999,833,620.59
  5. Step 5: Solve for x
    x = 2,999,833,620.59/70,503.35
  6. Step 6: Final answer
    x = 42,548.81

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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.