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Finding the Fourth Proportional to 69,000.30, 103,500.45 and 39,475.80

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Solution

The fourth proportional to 69,000.30, 103,500.45 and 39,475.80 is: 59,213.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,000.30 : 103,500.45 = 39,475.80 : x
  2. Step 2: Convert to fraction form
    69,000.30/103,500.45 = 39,475.80/x
  3. Step 3: Cross multiply
    69,000.30x = 103,500.45 × 39,475.80
  4. Step 4: Simplify right side
    69,000.30x = 4,085,763,064.11
  5. Step 5: Solve for x
    x = 4,085,763,064.11/69,000.30
  6. Step 6: Final answer
    x = 59,213.70

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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.