Home / 100,929.30-151,395.12-43,218.78

Finding the Fourth Proportional to 100,929.30, 151,395.12 and 43,218.78

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Solution

The fourth proportional to 100,929.30, 151,395.12 and 43,218.78 is: 64,828.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,929.30 : 151,395.12 = 43,218.78 : x
  2. Step 2: Convert to fraction form
    100,929.30/151,395.12 = 43,218.78/x
  3. Step 3: Cross multiply
    100,929.30x = 151,395.12 × 43,218.78
  4. Step 4: Simplify right side
    100,929.30x = 6,543,112,384.35
  5. Step 5: Solve for x
    x = 6,543,112,384.35/100,929.30
  6. Step 6: Final answer
    x = 64,828.67

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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.