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Finding the Fourth Proportional to 235,688.32, 325,240.20 and 128,258.80

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Solution

The fourth proportional to 235,688.32, 325,240.20 and 128,258.80 is: 176,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,688.32 : 325,240.20 = 128,258.80 : x
  2. Step 2: Convert to fraction form
    235,688.32/325,240.20 = 128,258.80/x
  3. Step 3: Cross multiply
    235,688.32x = 325,240.20 × 128,258.80
  4. Step 4: Simplify right side
    235,688.32x = 41,714,917,763.76
  5. Step 5: Solve for x
    x = 41,714,917,763.76/235,688.32
  6. Step 6: Final answer
    x = 176,991.88

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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.