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Finding the Fourth Proportional to 129,156.30, 193,544.91 and 91,788.30

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Solution

The fourth proportional to 129,156.30, 193,544.91 and 91,788.30 is: 137,547.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,156.30 : 193,544.91 = 91,788.30 : x
  2. Step 2: Convert to fraction form
    129,156.30/193,544.91 = 91,788.30/x
  3. Step 3: Cross multiply
    129,156.30x = 193,544.91 × 91,788.30
  4. Step 4: Simplify right side
    129,156.30x = 17,765,158,262.55
  5. Step 5: Solve for x
    x = 17,765,158,262.55/129,156.30
  6. Step 6: Final answer
    x = 137,547.75

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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.