Home / 128,857.04-177,822.24-72,268.28

Finding the Fourth Proportional to 128,857.04, 177,822.24 and 72,268.28

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Solution

The fourth proportional to 128,857.04, 177,822.24 and 72,268.28 is: 99,729.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857.04 : 177,822.24 = 72,268.28 : x
  2. Step 2: Convert to fraction form
    128,857.04/177,822.24 = 72,268.28/x
  3. Step 3: Cross multiply
    128,857.04x = 177,822.24 × 72,268.28
  4. Step 4: Simplify right side
    128,857.04x = 12,850,907,430.55
  5. Step 5: Solve for x
    x = 12,850,907,430.55/128,857.04
  6. Step 6: Final answer
    x = 99,729.96

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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.