Home / 128,853.37-177,777.30-74,398.42

Finding the Fourth Proportional to 128,853.37, 177,777.30 and 74,398.42

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Solution

The fourth proportional to 128,853.37, 177,777.30 and 74,398.42 is: 102,646.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.37 : 177,777.30 = 74,398.42 : x
  2. Step 2: Convert to fraction form
    128,853.37/177,777.30 = 74,398.42/x
  3. Step 3: Cross multiply
    128,853.37x = 177,777.30 × 74,398.42
  4. Step 4: Simplify right side
    128,853.37x = 13,226,350,231.87
  5. Step 5: Solve for x
    x = 13,226,350,231.87/128,853.37
  6. Step 6: Final answer
    x = 102,646.52

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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.