Home / 128,521,104.36-177,357,308.10-72,765,086.04

Finding the Fourth Proportional to 128,521,104.36, 177,357,308.10 and 72,765,086.04

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Solution

The fourth proportional to 128,521,104.36, 177,357,308.10 and 72,765,086.04 is: 100,414,790.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,521,104.36 : 177,357,308.10 = 72,765,086.04 : x
  2. Step 2: Convert to fraction form
    128,521,104.36/177,357,308.10 = 72,765,086.04/x
  3. Step 3: Cross multiply
    128,521,104.36x = 177,357,308.10 × 72,765,086.04
  4. Step 4: Simplify right side
    128,521,104.36x = 12,905,419,783,719,290
  5. Step 5: Solve for x
    x = 12,905,419,783,719,290/128,521,104.36
  6. Step 6: Final answer
    x = 100,414,790.61

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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.