Home / 81,307.24-121,961-53,403.55

Finding the Fourth Proportional to 81,307.24, 121,961 and 53,403.55

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Solution

The fourth proportional to 81,307.24, 121,961 and 53,403.55 is: 80,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,307.24 : 121,961 = 53,403.55 : x
  2. Step 2: Convert to fraction form
    81,307.24/121,961 = 53,403.55/x
  3. Step 3: Cross multiply
    81,307.24x = 121,961 × 53,403.55
  4. Step 4: Simplify right side
    81,307.24x = 6,513,150,361.55
  5. Step 5: Solve for x
    x = 6,513,150,361.55/81,307.24
  6. Step 6: Final answer
    x = 80,105.42

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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.