Home / 280,221,138.54-386,729,074.35-156,485,719.98

Finding the Fourth Proportional to 280,221,138.54, 386,729,074.35 and 156,485,719.98

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Solution

The fourth proportional to 280,221,138.54, 386,729,074.35 and 156,485,719.98 is: 215,963,641.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,221,138.54 : 386,729,074.35 = 156,485,719.98 : x
  2. Step 2: Convert to fraction form
    280,221,138.54/386,729,074.35 = 156,485,719.98/x
  3. Step 3: Cross multiply
    280,221,138.54x = 386,729,074.35 × 156,485,719.98
  4. Step 4: Simplify right side
    280,221,138.54x = 60,517,577,636,858,704
  5. Step 5: Solve for x
    x = 60,517,577,636,858,704/280,221,138.54
  6. Step 6: Final answer
    x = 215,963,641.97

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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.