Home / 128,557.58-177,419.30-74,118.60

Finding the Fourth Proportional to 128,557.58, 177,419.30 and 74,118.60

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Solution

The fourth proportional to 128,557.58, 177,419.30 and 74,118.60 is: 102,289.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,557.58 : 177,419.30 = 74,118.60 : x
  2. Step 2: Convert to fraction form
    128,557.58/177,419.30 = 74,118.60/x
  3. Step 3: Cross multiply
    128,557.58x = 177,419.30 × 74,118.60
  4. Step 4: Simplify right side
    128,557.58x = 13,150,069,758.39
  5. Step 5: Solve for x
    x = 13,150,069,758.39/128,557.58
  6. Step 6: Final answer
    x = 102,289.34

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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.