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Finding the Fourth Proportional to 194,258.80, 291,215.40 and 115,289.20

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Solution

The fourth proportional to 194,258.80, 291,215.40 and 115,289.20 is: 172,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,258.80 : 291,215.40 = 115,289.20 : x
  2. Step 2: Convert to fraction form
    194,258.80/291,215.40 = 115,289.20/x
  3. Step 3: Cross multiply
    194,258.80x = 291,215.40 × 115,289.20
  4. Step 4: Simplify right side
    194,258.80x = 33,573,990,493.68
  5. Step 5: Solve for x
    x = 33,573,990,493.68/194,258.80
  6. Step 6: Final answer
    x = 172,831.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.