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Finding the Fourth Proportional to 113,254.20, 156,313.80 and 65,512.80

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Solution

The fourth proportional to 113,254.20, 156,313.80 and 65,512.80 is: 90,420.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,254.20 : 156,313.80 = 65,512.80 : x
  2. Step 2: Convert to fraction form
    113,254.20/156,313.80 = 65,512.80/x
  3. Step 3: Cross multiply
    113,254.20x = 156,313.80 × 65,512.80
  4. Step 4: Simplify right side
    113,254.20x = 10,240,554,716.64
  5. Step 5: Solve for x
    x = 10,240,554,716.64/113,254.20
  6. Step 6: Final answer
    x = 90,420.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.