Home / 128,621.92-177,494.10-71,258.88

Finding the Fourth Proportional to 128,621.92, 177,494.10 and 71,258.88

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Solution

The fourth proportional to 128,621.92, 177,494.10 and 71,258.88 is: 98,334.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.92 : 177,494.10 = 71,258.88 : x
  2. Step 2: Convert to fraction form
    128,621.92/177,494.10 = 71,258.88/x
  3. Step 3: Cross multiply
    128,621.92x = 177,494.10 × 71,258.88
  4. Step 4: Simplify right side
    128,621.92x = 12,648,030,772.61
  5. Step 5: Solve for x
    x = 12,648,030,772.61/128,621.92
  6. Step 6: Final answer
    x = 98,334.96

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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.