Home / 128,610.60-177,439.46-74,884.11

Finding the Fourth Proportional to 128,610.60, 177,439.46 and 74,884.11

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Solution

The fourth proportional to 128,610.60, 177,439.46 and 74,884.11 is: 103,314.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,610.60 : 177,439.46 = 74,884.11 : x
  2. Step 2: Convert to fraction form
    128,610.60/177,439.46 = 74,884.11/x
  3. Step 3: Cross multiply
    128,610.60x = 177,439.46 × 74,884.11
  4. Step 4: Simplify right side
    128,610.60x = 13,287,395,666.56
  5. Step 5: Solve for x
    x = 13,287,395,666.56/128,610.60
  6. Step 6: Final answer
    x = 103,314.93

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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.