Home / 88,128.78-121,604.83-50,395.74

Finding the Fourth Proportional to 88,128.78, 121,604.83 and 50,395.74

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Solution

The fourth proportional to 88,128.78, 121,604.83 and 50,395.74 is: 69,538.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,128.78 : 121,604.83 = 50,395.74 : x
  2. Step 2: Convert to fraction form
    88,128.78/121,604.83 = 50,395.74/x
  3. Step 3: Cross multiply
    88,128.78x = 121,604.83 × 50,395.74
  4. Step 4: Simplify right side
    88,128.78x = 6,128,365,395.42
  5. Step 5: Solve for x
    x = 6,128,365,395.42/88,128.78
  6. Step 6: Final answer
    x = 69,538.75

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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.