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Finding the Fourth Proportional to 85,494.20, 128,087.70 and 73,206.20

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Solution

The fourth proportional to 85,494.20, 128,087.70 and 73,206.20 is: 109,677.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,494.20 : 128,087.70 = 73,206.20 : x
  2. Step 2: Convert to fraction form
    85,494.20/128,087.70 = 73,206.20/x
  3. Step 3: Cross multiply
    85,494.20x = 128,087.70 × 73,206.20
  4. Step 4: Simplify right side
    85,494.20x = 9,376,813,783.74
  5. Step 5: Solve for x
    x = 9,376,813,783.74/85,494.20
  6. Step 6: Final answer
    x = 109,677.78

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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.