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Finding the Fourth Proportional to 70,383.02, 105,581.40 and 20,463.50

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Solution

The fourth proportional to 70,383.02, 105,581.40 and 20,463.50 is: 30,697.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,383.02 : 105,581.40 = 20,463.50 : x
  2. Step 2: Convert to fraction form
    70,383.02/105,581.40 = 20,463.50/x
  3. Step 3: Cross multiply
    70,383.02x = 105,581.40 × 20,463.50
  4. Step 4: Simplify right side
    70,383.02x = 2,160,564,978.90
  5. Step 5: Solve for x
    x = 2,160,564,978.90/70,383.02
  6. Step 6: Final answer
    x = 30,697.25

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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.