Home / 71,938.20-107,907.30-64,939.80

Finding the Fourth Proportional to 71,938.20, 107,907.30 and 64,939.80

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Solution

The fourth proportional to 71,938.20, 107,907.30 and 64,939.80 is: 97,409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,938.20 : 107,907.30 = 64,939.80 : x
  2. Step 2: Convert to fraction form
    71,938.20/107,907.30 = 64,939.80/x
  3. Step 3: Cross multiply
    71,938.20x = 107,907.30 × 64,939.80
  4. Step 4: Simplify right side
    71,938.20x = 7,007,478,480.54
  5. Step 5: Solve for x
    x = 7,007,478,480.54/71,938.20
  6. Step 6: Final answer
    x = 97,409.70

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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.