Home / 128,549.36-177,355.13-74,822.97

Finding the Fourth Proportional to 128,549.36, 177,355.13 and 74,822.97

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Solution

The fourth proportional to 128,549.36, 177,355.13 and 74,822.97 is: 103,230.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,549.36 : 177,355.13 = 74,822.97 : x
  2. Step 2: Convert to fraction form
    128,549.36/177,355.13 = 74,822.97/x
  3. Step 3: Cross multiply
    128,549.36x = 177,355.13 × 74,822.97
  4. Step 4: Simplify right side
    128,549.36x = 13,270,237,571.34
  5. Step 5: Solve for x
    x = 13,270,237,571.34/128,549.36
  6. Step 6: Final answer
    x = 103,230.68

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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.