Home / 81,421.20-122,131.80-53,427.60

Finding the Fourth Proportional to 81,421.20, 122,131.80 and 53,427.60

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Solution

The fourth proportional to 81,421.20, 122,131.80 and 53,427.60 is: 80,141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.20 : 122,131.80 = 53,427.60 : x
  2. Step 2: Convert to fraction form
    81,421.20/122,131.80 = 53,427.60/x
  3. Step 3: Cross multiply
    81,421.20x = 122,131.80 × 53,427.60
  4. Step 4: Simplify right side
    81,421.20x = 6,525,208,957.68
  5. Step 5: Solve for x
    x = 6,525,208,957.68/81,421.20
  6. Step 6: Final answer
    x = 80,141.40

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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.