Home / 208,915.20-313,423.20-68,666.40

Finding the Fourth Proportional to 208,915.20, 313,423.20 and 68,666.40

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Solution

The fourth proportional to 208,915.20, 313,423.20 and 68,666.40 is: 103,016.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,915.20 : 313,423.20 = 68,666.40 : x
  2. Step 2: Convert to fraction form
    208,915.20/313,423.20 = 68,666.40/x
  3. Step 3: Cross multiply
    208,915.20x = 313,423.20 × 68,666.40
  4. Step 4: Simplify right side
    208,915.20x = 21,521,642,820.48
  5. Step 5: Solve for x
    x = 21,521,642,820.48/208,915.20
  6. Step 6: Final answer
    x = 103,016.17

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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.