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Finding the Fourth Proportional to 136,515.68, 204,642 and 69,987.04

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Solution

The fourth proportional to 136,515.68, 204,642 and 69,987.04 is: 104,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,515.68 : 204,642 = 69,987.04 : x
  2. Step 2: Convert to fraction form
    136,515.68/204,642 = 69,987.04/x
  3. Step 3: Cross multiply
    136,515.68x = 204,642 × 69,987.04
  4. Step 4: Simplify right side
    136,515.68x = 14,322,287,839.68
  5. Step 5: Solve for x
    x = 14,322,287,839.68/136,515.68
  6. Step 6: Final answer
    x = 104,913.13

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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.