Home / 90,019.20-134,945.31-30,840.81

Finding the Fourth Proportional to 90,019.20, 134,945.31 and 30,840.81

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Solution

The fourth proportional to 90,019.20, 134,945.31 and 30,840.81 is: 46,232.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,019.20 : 134,945.31 = 30,840.81 : x
  2. Step 2: Convert to fraction form
    90,019.20/134,945.31 = 30,840.81/x
  3. Step 3: Cross multiply
    90,019.20x = 134,945.31 × 30,840.81
  4. Step 4: Simplify right side
    90,019.20x = 4,161,822,666.10
  5. Step 5: Solve for x
    x = 4,161,822,666.10/90,019.20
  6. Step 6: Final answer
    x = 46,232.61

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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.