Home / 128,190.27-176,872.35-74,443.39

Finding the Fourth Proportional to 128,190.27, 176,872.35 and 74,443.39

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Solution

The fourth proportional to 128,190.27, 176,872.35 and 74,443.39 is: 102,714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,190.27 : 176,872.35 = 74,443.39 : x
  2. Step 2: Convert to fraction form
    128,190.27/176,872.35 = 74,443.39/x
  3. Step 3: Cross multiply
    128,190.27x = 176,872.35 × 74,443.39
  4. Step 4: Simplify right side
    128,190.27x = 13,166,977,331.27
  5. Step 5: Solve for x
    x = 13,166,977,331.27/128,190.27
  6. Step 6: Final answer
    x = 102,714.33

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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.