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Finding the Fourth Proportional to 89,770.76, 123,878.40 and 51,521.48

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Solution

The fourth proportional to 89,770.76, 123,878.40 and 51,521.48 is: 71,096.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,770.76 : 123,878.40 = 51,521.48 : x
  2. Step 2: Convert to fraction form
    89,770.76/123,878.40 = 51,521.48/x
  3. Step 3: Cross multiply
    89,770.76x = 123,878.40 × 51,521.48
  4. Step 4: Simplify right side
    89,770.76x = 6,382,398,508.03
  5. Step 5: Solve for x
    x = 6,382,398,508.03/89,770.76
  6. Step 6: Final answer
    x = 71,096.63

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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.