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Finding the Fourth Proportional to 77,486.40, 116,240.40 and 33,112.80

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Solution

The fourth proportional to 77,486.40, 116,240.40 and 33,112.80 is: 49,673.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,486.40 : 116,240.40 = 33,112.80 : x
  2. Step 2: Convert to fraction form
    77,486.40/116,240.40 = 33,112.80/x
  3. Step 3: Cross multiply
    77,486.40x = 116,240.40 × 33,112.80
  4. Step 4: Simplify right side
    77,486.40x = 3,849,045,117.12
  5. Step 5: Solve for x
    x = 3,849,045,117.12/77,486.40
  6. Step 6: Final answer
    x = 49,673.82

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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.