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Finding the Fourth Proportional to 71,576.40, 107,364.60 and 70,920.30

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Solution

The fourth proportional to 71,576.40, 107,364.60 and 70,920.30 is: 106,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,576.40 : 107,364.60 = 70,920.30 : x
  2. Step 2: Convert to fraction form
    71,576.40/107,364.60 = 70,920.30/x
  3. Step 3: Cross multiply
    71,576.40x = 107,364.60 × 70,920.30
  4. Step 4: Simplify right side
    71,576.40x = 7,614,329,641.38
  5. Step 5: Solve for x
    x = 7,614,329,641.38/71,576.40
  6. Step 6: Final answer
    x = 106,380.45

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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.