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Finding the Fourth Proportional to 67,090.60, 100,712.70 and 39,404.20

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Solution

The fourth proportional to 67,090.60, 100,712.70 and 39,404.20 is: 59,151.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,090.60 : 100,712.70 = 39,404.20 : x
  2. Step 2: Convert to fraction form
    67,090.60/100,712.70 = 39,404.20/x
  3. Step 3: Cross multiply
    67,090.60x = 100,712.70 × 39,404.20
  4. Step 4: Simplify right side
    67,090.60x = 3,968,503,373.34
  5. Step 5: Solve for x
    x = 3,968,503,373.34/67,090.60
  6. Step 6: Final answer
    x = 59,151.41

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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.