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Finding the Fourth Proportional to 70,215.72, 105,321.96 and 35,129.76

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Solution

The fourth proportional to 70,215.72, 105,321.96 and 35,129.76 is: 52,693.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,215.72 : 105,321.96 = 35,129.76 : x
  2. Step 2: Convert to fraction form
    70,215.72/105,321.96 = 35,129.76/x
  3. Step 3: Cross multiply
    70,215.72x = 105,321.96 × 35,129.76
  4. Step 4: Simplify right side
    70,215.72x = 3,699,935,177.53
  5. Step 5: Solve for x
    x = 3,699,935,177.53/70,215.72
  6. Step 6: Final answer
    x = 52,693.83

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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.