Home / 81,178.48-121,782.84-28,621.36

Finding the Fourth Proportional to 81,178.48, 121,782.84 and 28,621.36

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Solution

The fourth proportional to 81,178.48, 121,782.84 and 28,621.36 is: 42,937.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,178.48 : 121,782.84 = 28,621.36 : x
  2. Step 2: Convert to fraction form
    81,178.48/121,782.84 = 28,621.36/x
  3. Step 3: Cross multiply
    81,178.48x = 121,782.84 × 28,621.36
  4. Step 4: Simplify right side
    81,178.48x = 3,485,590,505.46
  5. Step 5: Solve for x
    x = 3,485,590,505.46/81,178.48
  6. Step 6: Final answer
    x = 42,937.37

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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.