Home / 81,429.20-122,143.80-53,435.60

Finding the Fourth Proportional to 81,429.20, 122,143.80 and 53,435.60

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Solution

The fourth proportional to 81,429.20, 122,143.80 and 53,435.60 is: 80,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,429.20 : 122,143.80 = 53,435.60 : x
  2. Step 2: Convert to fraction form
    81,429.20/122,143.80 = 53,435.60/x
  3. Step 3: Cross multiply
    81,429.20x = 122,143.80 × 53,435.60
  4. Step 4: Simplify right side
    81,429.20x = 6,526,827,239.28
  5. Step 5: Solve for x
    x = 6,526,827,239.28/81,429.20
  6. Step 6: Final answer
    x = 80,153.40

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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.