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Finding the Fourth Proportional to 128,453.04, 177,263.64 and 80,734.32

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Solution

The fourth proportional to 128,453.04, 177,263.64 and 80,734.32 is: 111,412.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,453.04 : 177,263.64 = 80,734.32 : x
  2. Step 2: Convert to fraction form
    128,453.04/177,263.64 = 80,734.32/x
  3. Step 3: Cross multiply
    128,453.04x = 177,263.64 × 80,734.32
  4. Step 4: Simplify right side
    128,453.04x = 14,311,259,436.12
  5. Step 5: Solve for x
    x = 14,311,259,436.12/128,453.04
  6. Step 6: Final answer
    x = 111,412.38

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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.