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Finding the Fourth Proportional to 71,715.70, 107,573.55 and 42,166.90

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Solution

The fourth proportional to 71,715.70, 107,573.55 and 42,166.90 is: 63,250.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,715.70 : 107,573.55 = 42,166.90 : x
  2. Step 2: Convert to fraction form
    71,715.70/107,573.55 = 42,166.90/x
  3. Step 3: Cross multiply
    71,715.70x = 107,573.55 × 42,166.90
  4. Step 4: Simplify right side
    71,715.70x = 4,536,043,125.50
  5. Step 5: Solve for x
    x = 4,536,043,125.50/71,715.70
  6. Step 6: Final answer
    x = 63,250.35

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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.