Home / 81,507.36-122,220.72-28,908.96

Finding the Fourth Proportional to 81,507.36, 122,220.72 and 28,908.96

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Solution

The fourth proportional to 81,507.36, 122,220.72 and 28,908.96 is: 43,349.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.36 : 122,220.72 = 28,908.96 : x
  2. Step 2: Convert to fraction form
    81,507.36/122,220.72 = 28,908.96/x
  3. Step 3: Cross multiply
    81,507.36x = 122,220.72 × 28,908.96
  4. Step 4: Simplify right side
    81,507.36x = 3,533,273,905.65
  5. Step 5: Solve for x
    x = 3,533,273,905.65/81,507.36
  6. Step 6: Final answer
    x = 43,349.14

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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.