Home / 71,420.09-107,143.67-28,728.78

Finding the Fourth Proportional to 71,420.09, 107,143.67 and 28,728.78

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Solution

The fourth proportional to 71,420.09, 107,143.67 and 28,728.78 is: 43,098.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,420.09 : 107,143.67 = 28,728.78 : x
  2. Step 2: Convert to fraction form
    71,420.09/107,143.67 = 28,728.78/x
  3. Step 3: Cross multiply
    71,420.09x = 107,143.67 × 28,728.78
  4. Step 4: Simplify right side
    71,420.09x = 3,078,107,263.50
  5. Step 5: Solve for x
    x = 3,078,107,263.50/71,420.09
  6. Step 6: Final answer
    x = 43,098.62

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1.5x scale

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.