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Finding the Fourth Proportional to 260,108.40, 390,162.60 and 73,119.90

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Solution

The fourth proportional to 260,108.40, 390,162.60 and 73,119.90 is: 109,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,108.40 : 390,162.60 = 73,119.90 : x
  2. Step 2: Convert to fraction form
    260,108.40/390,162.60 = 73,119.90/x
  3. Step 3: Cross multiply
    260,108.40x = 390,162.60 × 73,119.90
  4. Step 4: Simplify right side
    260,108.40x = 28,528,650,295.74
  5. Step 5: Solve for x
    x = 28,528,650,295.74/260,108.40
  6. Step 6: Final answer
    x = 109,679.85

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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.