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Finding the Fourth Proportional to 71,915.40, 108,002.70 and 69,582.60

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Solution

The fourth proportional to 71,915.40, 108,002.70 and 69,582.60 is: 104,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.40 : 108,002.70 = 69,582.60 : x
  2. Step 2: Convert to fraction form
    71,915.40/108,002.70 = 69,582.60/x
  3. Step 3: Cross multiply
    71,915.40x = 108,002.70 × 69,582.60
  4. Step 4: Simplify right side
    71,915.40x = 7,515,108,673.02
  5. Step 5: Solve for x
    x = 7,515,108,673.02/71,915.40
  6. Step 6: Final answer
    x = 104,499.30

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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.