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Finding the Fourth Proportional to 89,415.40, 133,928.70 and 54,293.80

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Solution

The fourth proportional to 89,415.40, 133,928.70 and 54,293.80 is: 81,322.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,415.40 : 133,928.70 = 54,293.80 : x
  2. Step 2: Convert to fraction form
    89,415.40/133,928.70 = 54,293.80/x
  3. Step 3: Cross multiply
    89,415.40x = 133,928.70 × 54,293.80
  4. Step 4: Simplify right side
    89,415.40x = 7,271,498,052.06
  5. Step 5: Solve for x
    x = 7,271,498,052.06/89,415.40
  6. Step 6: Final answer
    x = 81,322.66

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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.