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Finding the Fourth Proportional to 68,877.33, 103,055.16 and 40,812.45

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Solution

The fourth proportional to 68,877.33, 103,055.16 and 40,812.45 is: 61,064.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,877.33 : 103,055.16 = 40,812.45 : x
  2. Step 2: Convert to fraction form
    68,877.33/103,055.16 = 40,812.45/x
  3. Step 3: Cross multiply
    68,877.33x = 103,055.16 × 40,812.45
  4. Step 4: Simplify right side
    68,877.33x = 4,205,933,564.74
  5. Step 5: Solve for x
    x = 4,205,933,564.74/68,877.33
  6. Step 6: Final answer
    x = 61,064.12

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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.