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Finding the Fourth Proportional to 81,421.40, 122,132.10 and 67,597.40

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Solution

The fourth proportional to 81,421.40, 122,132.10 and 67,597.40 is: 101,396.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.40 : 122,132.10 = 67,597.40 : x
  2. Step 2: Convert to fraction form
    81,421.40/122,132.10 = 67,597.40/x
  3. Step 3: Cross multiply
    81,421.40x = 122,132.10 × 67,597.40
  4. Step 4: Simplify right side
    81,421.40x = 8,255,812,416.54
  5. Step 5: Solve for x
    x = 8,255,812,416.54/81,421.40
  6. Step 6: Final answer
    x = 101,396.10

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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.