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Finding the Fourth Proportional to 70,652.40, 105,995 and 20,730.48

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Solution

The fourth proportional to 70,652.40, 105,995 and 20,730.48 is: 31,100.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,652.40 : 105,995 = 20,730.48 : x
  2. Step 2: Convert to fraction form
    70,652.40/105,995 = 20,730.48/x
  3. Step 3: Cross multiply
    70,652.40x = 105,995 × 20,730.48
  4. Step 4: Simplify right side
    70,652.40x = 2,197,327,227.60
  5. Step 5: Solve for x
    x = 2,197,327,227.60/70,652.40
  6. Step 6: Final answer
    x = 31,100.53

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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.