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Finding the Fourth Proportional to 260,486.81, 390,776.69 and 92,104.90

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Solution

The fourth proportional to 260,486.81, 390,776.69 and 92,104.90 is: 138,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,486.81 : 390,776.69 = 92,104.90 : x
  2. Step 2: Convert to fraction form
    260,486.81/390,776.69 = 92,104.90/x
  3. Step 3: Cross multiply
    260,486.81x = 390,776.69 × 92,104.90
  4. Step 4: Simplify right side
    260,486.81x = 35,992,447,954.78
  5. Step 5: Solve for x
    x = 35,992,447,954.78/260,486.81
  6. Step 6: Final answer
    x = 138,173.78

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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.