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Finding the Fourth Proportional to 154,797.75, 213,624.14 and 87,729.75

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Solution

The fourth proportional to 154,797.75, 213,624.14 and 87,729.75 is: 121,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,797.75 : 213,624.14 = 87,729.75 : x
  2. Step 2: Convert to fraction form
    154,797.75/213,624.14 = 87,729.75/x
  3. Step 3: Cross multiply
    154,797.75x = 213,624.14 × 87,729.75
  4. Step 4: Simplify right side
    154,797.75x = 18,741,191,957.52
  5. Step 5: Solve for x
    x = 18,741,191,957.52/154,797.75
  6. Step 6: Final answer
    x = 121,068.89

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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.