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Finding the Fourth Proportional to 84,291.80, 126,474.15 and 42,738.80

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Solution

The fourth proportional to 84,291.80, 126,474.15 and 42,738.80 is: 64,126.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,291.80 : 126,474.15 = 42,738.80 : x
  2. Step 2: Convert to fraction form
    84,291.80/126,474.15 = 42,738.80/x
  3. Step 3: Cross multiply
    84,291.80x = 126,474.15 × 42,738.80
  4. Step 4: Simplify right side
    84,291.80x = 5,405,353,402.02
  5. Step 5: Solve for x
    x = 5,405,353,402.02/84,291.80
  6. Step 6: Final answer
    x = 64,126.68

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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.