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Finding the Fourth Proportional to 84,588.71, 126,870.54 and 51,299.84

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Solution

The fourth proportional to 84,588.71, 126,870.54 and 51,299.84 is: 76,942.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,588.71 : 126,870.54 = 51,299.84 : x
  2. Step 2: Convert to fraction form
    84,588.71/126,870.54 = 51,299.84/x
  3. Step 3: Cross multiply
    84,588.71x = 126,870.54 × 51,299.84
  4. Step 4: Simplify right side
    84,588.71x = 6,508,437,813.87
  5. Step 5: Solve for x
    x = 6,508,437,813.87/84,588.71
  6. Step 6: Final answer
    x = 76,942.16

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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.