Home / 81,277.96-121,921.02-25,878.28

Finding the Fourth Proportional to 81,277.96, 121,921.02 and 25,878.28

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Solution

The fourth proportional to 81,277.96, 121,921.02 and 25,878.28 is: 38,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,277.96 : 121,921.02 = 25,878.28 : x
  2. Step 2: Convert to fraction form
    81,277.96/121,921.02 = 25,878.28/x
  3. Step 3: Cross multiply
    81,277.96x = 121,921.02 × 25,878.28
  4. Step 4: Simplify right side
    81,277.96x = 3,155,106,293.45
  5. Step 5: Solve for x
    x = 3,155,106,293.45/81,277.96
  6. Step 6: Final answer
    x = 38,818.72

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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.