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Finding the Fourth Proportional to 74,778.49, 103,073.43 and 65,063.13

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Solution

The fourth proportional to 74,778.49, 103,073.43 and 65,063.13 is: 89,681.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,778.49 : 103,073.43 = 65,063.13 : x
  2. Step 2: Convert to fraction form
    74,778.49/103,073.43 = 65,063.13/x
  3. Step 3: Cross multiply
    74,778.49x = 103,073.43 × 65,063.13
  4. Step 4: Simplify right side
    74,778.49x = 6,706,279,975.64
  5. Step 5: Solve for x
    x = 6,706,279,975.64/74,778.49
  6. Step 6: Final answer
    x = 89,681.94

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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.