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Finding the Fourth Proportional to 70,167.79, 105,277.88 and 42,107.97

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Solution

The fourth proportional to 70,167.79, 105,277.88 and 42,107.97 is: 63,177.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,167.79 : 105,277.88 = 42,107.97 : x
  2. Step 2: Convert to fraction form
    70,167.79/105,277.88 = 42,107.97/x
  3. Step 3: Cross multiply
    70,167.79x = 105,277.88 × 42,107.97
  4. Step 4: Simplify right side
    70,167.79x = 4,433,037,812.70
  5. Step 5: Solve for x
    x = 4,433,037,812.70/70,167.79
  6. Step 6: Final answer
    x = 63,177.67

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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.