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Finding the Fourth Proportional to 71,960.90, 107,941.35 and 40,856.90

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Solution

The fourth proportional to 71,960.90, 107,941.35 and 40,856.90 is: 61,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,960.90 : 107,941.35 = 40,856.90 : x
  2. Step 2: Convert to fraction form
    71,960.90/107,941.35 = 40,856.90/x
  3. Step 3: Cross multiply
    71,960.90x = 107,941.35 × 40,856.90
  4. Step 4: Simplify right side
    71,960.90x = 4,410,148,942.82
  5. Step 5: Solve for x
    x = 4,410,148,942.82/71,960.90
  6. Step 6: Final answer
    x = 61,285.35

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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.