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Finding the Fourth Proportional to 89,783.78, 134,631.59 and 51,310.80

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Solution

The fourth proportional to 89,783.78, 134,631.59 and 51,310.80 is: 76,941.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,783.78 : 134,631.59 = 51,310.80 : x
  2. Step 2: Convert to fraction form
    89,783.78/134,631.59 = 51,310.80/x
  3. Step 3: Cross multiply
    89,783.78x = 134,631.59 × 51,310.80
  4. Step 4: Simplify right side
    89,783.78x = 6,908,054,331.62
  5. Step 5: Solve for x
    x = 6,908,054,331.62/89,783.78
  6. Step 6: Final answer
    x = 76,941.01

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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.