Home / 90,638.46-125,046.18-66,821.76

Finding the Fourth Proportional to 90,638.46, 125,046.18 and 66,821.76

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Solution

The fourth proportional to 90,638.46, 125,046.18 and 66,821.76 is: 92,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638.46 : 125,046.18 = 66,821.76 : x
  2. Step 2: Convert to fraction form
    90,638.46/125,046.18 = 66,821.76/x
  3. Step 3: Cross multiply
    90,638.46x = 125,046.18 × 66,821.76
  4. Step 4: Simplify right side
    90,638.46x = 8,355,805,828.88
  5. Step 5: Solve for x
    x = 8,355,805,828.88/90,638.46
  6. Step 6: Final answer
    x = 92,188.30

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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.