Home / 81,420.10-122,126.10-41,981.20

Finding the Fourth Proportional to 81,420.10, 122,126.10 and 41,981.20

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Solution

The fourth proportional to 81,420.10, 122,126.10 and 41,981.20 is: 62,969.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.10 : 122,126.10 = 41,981.20 : x
  2. Step 2: Convert to fraction form
    81,420.10/122,126.10 = 41,981.20/x
  3. Step 3: Cross multiply
    81,420.10x = 122,126.10 × 41,981.20
  4. Step 4: Simplify right side
    81,420.10x = 5,127,000,229.32
  5. Step 5: Solve for x
    x = 5,127,000,229.32/81,420.10
  6. Step 6: Final answer
    x = 62,969.71

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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.