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Finding the Fourth Proportional to 89,611.20, 134,416.80 and 79,934.40

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Solution

The fourth proportional to 89,611.20, 134,416.80 and 79,934.40 is: 119,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,611.20 : 134,416.80 = 79,934.40 : x
  2. Step 2: Convert to fraction form
    89,611.20/134,416.80 = 79,934.40/x
  3. Step 3: Cross multiply
    89,611.20x = 134,416.80 × 79,934.40
  4. Step 4: Simplify right side
    89,611.20x = 10,744,526,257.92
  5. Step 5: Solve for x
    x = 10,744,526,257.92/89,611.20
  6. Step 6: Final answer
    x = 119,901.60

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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.