Home / 81,222.55-121,815.60-53,338.30

Finding the Fourth Proportional to 81,222.55, 121,815.60 and 53,338.30

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Solution

The fourth proportional to 81,222.55, 121,815.60 and 53,338.30 is: 79,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,222.55 : 121,815.60 = 53,338.30 : x
  2. Step 2: Convert to fraction form
    81,222.55/121,815.60 = 53,338.30/x
  3. Step 3: Cross multiply
    81,222.55x = 121,815.60 × 53,338.30
  4. Step 4: Simplify right side
    81,222.55x = 6,497,437,017.48
  5. Step 5: Solve for x
    x = 6,497,437,017.48/81,222.55
  6. Step 6: Final answer
    x = 79,995.48

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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.