Home / 81,002.80-121,115.40-60,007.60

Finding the Fourth Proportional to 81,002.80, 121,115.40 and 60,007.60

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Solution

The fourth proportional to 81,002.80, 121,115.40 and 60,007.60 is: 89,723.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.80 : 121,115.40 = 60,007.60 : x
  2. Step 2: Convert to fraction form
    81,002.80/121,115.40 = 60,007.60/x
  3. Step 3: Cross multiply
    81,002.80x = 121,115.40 × 60,007.60
  4. Step 4: Simplify right side
    81,002.80x = 7,267,844,477.04
  5. Step 5: Solve for x
    x = 7,267,844,477.04/81,002.80
  6. Step 6: Final answer
    x = 89,723.37

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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.