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Finding the Fourth Proportional to 225,322.58, 310,979.32 and 128,525.96

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Solution

The fourth proportional to 225,322.58, 310,979.32 and 128,525.96 is: 177,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,322.58 : 310,979.32 = 128,525.96 : x
  2. Step 2: Convert to fraction form
    225,322.58/310,979.32 = 128,525.96/x
  3. Step 3: Cross multiply
    225,322.58x = 310,979.32 × 128,525.96
  4. Step 4: Simplify right side
    225,322.58x = 39,968,916,099.28
  5. Step 5: Solve for x
    x = 39,968,916,099.28/225,322.58
  6. Step 6: Final answer
    x = 177,385.31

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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.