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Finding the Fourth Proportional to 68,998.64, 103,328.04 and 39,343.28

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Solution

The fourth proportional to 68,998.64, 103,328.04 and 39,343.28 is: 58,918.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,998.64 : 103,328.04 = 39,343.28 : x
  2. Step 2: Convert to fraction form
    68,998.64/103,328.04 = 39,343.28/x
  3. Step 3: Cross multiply
    68,998.64x = 103,328.04 × 39,343.28
  4. Step 4: Simplify right side
    68,998.64x = 4,065,264,009.57
  5. Step 5: Solve for x
    x = 4,065,264,009.57/68,998.64
  6. Step 6: Final answer
    x = 58,918.03

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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.