Home / 102,180.06-153,135.12-78,396.64

Finding the Fourth Proportional to 102,180.06, 153,135.12 and 78,396.64

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Solution

The fourth proportional to 102,180.06, 153,135.12 and 78,396.64 is: 117,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,180.06 : 153,135.12 = 78,396.64 : x
  2. Step 2: Convert to fraction form
    102,180.06/153,135.12 = 78,396.64/x
  3. Step 3: Cross multiply
    102,180.06x = 153,135.12 × 78,396.64
  4. Step 4: Simplify right side
    102,180.06x = 12,005,278,874.00
  5. Step 5: Solve for x
    x = 12,005,278,874.00/102,180.06
  6. Step 6: Final answer
    x = 117,491.41

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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.