Home / 128,578,342.83-177,452,832.39-72,078,348.74

Finding the Fourth Proportional to 128,578,342.83, 177,452,832.39 and 72,078,348.74

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Solution

The fourth proportional to 128,578,342.83, 177,452,832.39 and 72,078,348.74 is: 99,476,372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,578,342.83 : 177,452,832.39 = 72,078,348.74 : x
  2. Step 2: Convert to fraction form
    128,578,342.83/177,452,832.39 = 72,078,348.74/x
  3. Step 3: Cross multiply
    128,578,342.83x = 177,452,832.39 × 72,078,348.74
  4. Step 4: Simplify right side
    128,578,342.83x = 12,790,507,137,019,922
  5. Step 5: Solve for x
    x = 12,790,507,137,019,922/128,578,342.83
  6. Step 6: Final answer
    x = 99,476,372.58

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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.