Home / 128,555,591.39-177,417,657.25-72,810,928.31

Finding the Fourth Proportional to 128,555,591.39, 177,417,657.25 and 72,810,928.31

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Solution

The fourth proportional to 128,555,591.39, 177,417,657.25 and 72,810,928.31 is: 100,485,277.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,591.39 : 177,417,657.25 = 72,810,928.31 : x
  2. Step 2: Convert to fraction form
    128,555,591.39/177,417,657.25 = 72,810,928.31/x
  3. Step 3: Cross multiply
    128,555,591.39x = 177,417,657.25 × 72,810,928.31
  4. Step 4: Simplify right side
    128,555,591.39x = 12,917,944,323,219,418
  5. Step 5: Solve for x
    x = 12,917,944,323,219,418/128,555,591.39
  6. Step 6: Final answer
    x = 100,485,277.88

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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.