Home / 81,621.60-122,302.80-53,887.20

Finding the Fourth Proportional to 81,621.60, 122,302.80 and 53,887.20

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Solution

The fourth proportional to 81,621.60, 122,302.80 and 53,887.20 is: 80,745.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.60 : 122,302.80 = 53,887.20 : x
  2. Step 2: Convert to fraction form
    81,621.60/122,302.80 = 53,887.20/x
  3. Step 3: Cross multiply
    81,621.60x = 122,302.80 × 53,887.20
  4. Step 4: Simplify right side
    81,621.60x = 6,590,555,444.16
  5. Step 5: Solve for x
    x = 6,590,555,444.16/81,621.60
  6. Step 6: Final answer
    x = 80,745.24

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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.