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Finding the Fourth Proportional to 70,179.79, 105,295.92 and 42,119.95

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Solution

The fourth proportional to 70,179.79, 105,295.92 and 42,119.95 is: 63,195.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,179.79 : 105,295.92 = 42,119.95 : x
  2. Step 2: Convert to fraction form
    70,179.79/105,295.92 = 42,119.95/x
  3. Step 3: Cross multiply
    70,179.79x = 105,295.92 × 42,119.95
  4. Step 4: Simplify right side
    70,179.79x = 4,435,058,885.60
  5. Step 5: Solve for x
    x = 4,435,058,885.60/70,179.79
  6. Step 6: Final answer
    x = 63,195.67

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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.