Home / 128,974.48-177,933.92-74,490.64

Finding the Fourth Proportional to 128,974.48, 177,933.92 and 74,490.64

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Solution

The fourth proportional to 128,974.48, 177,933.92 and 74,490.64 is: 102,767.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,974.48 : 177,933.92 = 74,490.64 : x
  2. Step 2: Convert to fraction form
    128,974.48/177,933.92 = 74,490.64/x
  3. Step 3: Cross multiply
    128,974.48x = 177,933.92 × 74,490.64
  4. Step 4: Simplify right side
    128,974.48x = 13,254,411,578.51
  5. Step 5: Solve for x
    x = 13,254,411,578.51/128,974.48
  6. Step 6: Final answer
    x = 102,767.71

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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.