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Finding the Fourth Proportional to 260,111.88, 390,167.82 and 73,123.40

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Solution

The fourth proportional to 260,111.88, 390,167.82 and 73,123.40 is: 109,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,111.88 : 390,167.82 = 73,123.40 : x
  2. Step 2: Convert to fraction form
    260,111.88/390,167.82 = 73,123.40/x
  3. Step 3: Cross multiply
    260,111.88x = 390,167.82 × 73,123.40
  4. Step 4: Simplify right side
    260,111.88x = 28,530,397,568.99
  5. Step 5: Solve for x
    x = 28,530,397,568.99/260,111.88
  6. Step 6: Final answer
    x = 109,685.10

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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.