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Finding the Fourth Proportional to 66,910.80, 100,366.20 and 51,164.40

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Solution

The fourth proportional to 66,910.80, 100,366.20 and 51,164.40 is: 76,746.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,910.80 : 100,366.20 = 51,164.40 : x
  2. Step 2: Convert to fraction form
    66,910.80/100,366.20 = 51,164.40/x
  3. Step 3: Cross multiply
    66,910.80x = 100,366.20 × 51,164.40
  4. Step 4: Simplify right side
    66,910.80x = 5,135,176,403.28
  5. Step 5: Solve for x
    x = 5,135,176,403.28/66,910.80
  6. Step 6: Final answer
    x = 76,746.60

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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.