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Finding the Fourth Proportional to 128,579.76, 177,321.06 and 88,222.32

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Solution

The fourth proportional to 128,579.76, 177,321.06 and 88,222.32 is: 121,665.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,579.76 : 177,321.06 = 88,222.32 : x
  2. Step 2: Convert to fraction form
    128,579.76/177,321.06 = 88,222.32/x
  3. Step 3: Cross multiply
    128,579.76x = 177,321.06 × 88,222.32
  4. Step 4: Simplify right side
    128,579.76x = 15,643,675,298.06
  5. Step 5: Solve for x
    x = 15,643,675,298.06/128,579.76
  6. Step 6: Final answer
    x = 121,665.15

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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.