Home / 208,135.62-312,076.98-81,624.30

Finding the Fourth Proportional to 208,135.62, 312,076.98 and 81,624.30

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Solution

The fourth proportional to 208,135.62, 312,076.98 and 81,624.30 is: 122,386.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,135.62 : 312,076.98 = 81,624.30 : x
  2. Step 2: Convert to fraction form
    208,135.62/312,076.98 = 81,624.30/x
  3. Step 3: Cross multiply
    208,135.62x = 312,076.98 × 81,624.30
  4. Step 4: Simplify right side
    208,135.62x = 25,473,065,038.61
  5. Step 5: Solve for x
    x = 25,473,065,038.61/208,135.62
  6. Step 6: Final answer
    x = 122,386.86

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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.