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Finding the Fourth Proportional to 89,611.92, 123,706.44 and 51,878.88

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Solution

The fourth proportional to 89,611.92, 123,706.44 and 51,878.88 is: 71,617.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,611.92 : 123,706.44 = 51,878.88 : x
  2. Step 2: Convert to fraction form
    89,611.92/123,706.44 = 51,878.88/x
  3. Step 3: Cross multiply
    89,611.92x = 123,706.44 × 51,878.88
  4. Step 4: Simplify right side
    89,611.92x = 6,417,751,555.99
  5. Step 5: Solve for x
    x = 6,417,751,555.99/89,611.92
  6. Step 6: Final answer
    x = 71,617.16

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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.