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Finding the Fourth Proportional to 84,459.20, 126,615.90 and 42,906.20

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Solution

The fourth proportional to 84,459.20, 126,615.90 and 42,906.20 is: 64,322.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,459.20 : 126,615.90 = 42,906.20 : x
  2. Step 2: Convert to fraction form
    84,459.20/126,615.90 = 42,906.20/x
  3. Step 3: Cross multiply
    84,459.20x = 126,615.90 × 42,906.20
  4. Step 4: Simplify right side
    84,459.20x = 5,432,607,128.58
  5. Step 5: Solve for x
    x = 5,432,607,128.58/84,459.20
  6. Step 6: Final answer
    x = 64,322.27

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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.