Home / 81,449.25-112,406.45-47,921.73

Finding the Fourth Proportional to 81,449.25, 112,406.45 and 47,921.73

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Solution

The fourth proportional to 81,449.25, 112,406.45 and 47,921.73 is: 66,135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,449.25 : 112,406.45 = 47,921.73 : x
  2. Step 2: Convert to fraction form
    81,449.25/112,406.45 = 47,921.73/x
  3. Step 3: Cross multiply
    81,449.25x = 112,406.45 × 47,921.73
  4. Step 4: Simplify right side
    81,449.25x = 5,386,711,307.55
  5. Step 5: Solve for x
    x = 5,386,711,307.55/81,449.25
  6. Step 6: Final answer
    x = 66,135.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.