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Finding the Fourth Proportional to 70,138.56, 105,204.96 and 38,953.92

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Solution

The fourth proportional to 70,138.56, 105,204.96 and 38,953.92 is: 58,429.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,138.56 : 105,204.96 = 38,953.92 : x
  2. Step 2: Convert to fraction form
    70,138.56/105,204.96 = 38,953.92/x
  3. Step 3: Cross multiply
    70,138.56x = 105,204.96 × 38,953.92
  4. Step 4: Simplify right side
    70,138.56x = 4,098,145,595.44
  5. Step 5: Solve for x
    x = 4,098,145,595.44/70,138.56
  6. Step 6: Final answer
    x = 58,429.28

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1.5x scale

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.