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Finding the Fourth Proportional to 68,108.84, 93,988.73 and 39,429.71

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Solution

The fourth proportional to 68,108.84, 93,988.73 and 39,429.71 is: 54,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,108.84 : 93,988.73 = 39,429.71 : x
  2. Step 2: Convert to fraction form
    68,108.84/93,988.73 = 39,429.71/x
  3. Step 3: Cross multiply
    68,108.84x = 93,988.73 × 39,429.71
  4. Step 4: Simplify right side
    68,108.84x = 3,705,948,501.70
  5. Step 5: Solve for x
    x = 3,705,948,501.70/68,108.84
  6. Step 6: Final answer
    x = 54,412.15

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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.