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Finding the Fourth Proportional to 70,079.76, 105,059.60 and 30,607.92

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Solution

The fourth proportional to 70,079.76, 105,059.60 and 30,607.92 is: 45,885.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,079.76 : 105,059.60 = 30,607.92 : x
  2. Step 2: Convert to fraction form
    70,079.76/105,059.60 = 30,607.92/x
  3. Step 3: Cross multiply
    70,079.76x = 105,059.60 × 30,607.92
  4. Step 4: Simplify right side
    70,079.76x = 3,215,655,832.03
  5. Step 5: Solve for x
    x = 3,215,655,832.03/70,079.76
  6. Step 6: Final answer
    x = 45,885.66

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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.