Home / 102,939.20-154,390.08-30,877.28

Finding the Fourth Proportional to 102,939.20, 154,390.08 and 30,877.28

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Solution

The fourth proportional to 102,939.20, 154,390.08 and 30,877.28 is: 46,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,939.20 : 154,390.08 = 30,877.28 : x
  2. Step 2: Convert to fraction form
    102,939.20/154,390.08 = 30,877.28/x
  3. Step 3: Cross multiply
    102,939.20x = 154,390.08 × 30,877.28
  4. Step 4: Simplify right side
    102,939.20x = 4,767,145,729.38
  5. Step 5: Solve for x
    x = 4,767,145,729.38/102,939.20
  6. Step 6: Final answer
    x = 46,310.30

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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.