Home / 343,895.20-515,915.70-103,989.40

Finding the Fourth Proportional to 343,895.20, 515,915.70 and 103,989.40

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Solution

The fourth proportional to 343,895.20, 515,915.70 and 103,989.40 is: 156,006.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,895.20 : 515,915.70 = 103,989.40 : x
  2. Step 2: Convert to fraction form
    343,895.20/515,915.70 = 103,989.40/x
  3. Step 3: Cross multiply
    343,895.20x = 515,915.70 × 103,989.40
  4. Step 4: Simplify right side
    343,895.20x = 53,649,764,093.58
  5. Step 5: Solve for x
    x = 53,649,764,093.58/343,895.20
  6. Step 6: Final answer
    x = 156,006.14

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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.