Home / 128,578,342.58-177,452,832.05-72,078,348.49

Finding the Fourth Proportional to 128,578,342.58, 177,452,832.05 and 72,078,348.49

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Solution

The fourth proportional to 128,578,342.58, 177,452,832.05 and 72,078,348.49 is: 99,476,372.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,578,342.58 : 177,452,832.05 = 72,078,348.49 : x
  2. Step 2: Convert to fraction form
    128,578,342.58/177,452,832.05 = 72,078,348.49/x
  3. Step 3: Cross multiply
    128,578,342.58x = 177,452,832.05 × 72,078,348.49
  4. Step 4: Simplify right side
    128,578,342.58x = 12,790,507,068,150,078
  5. Step 5: Solve for x
    x = 12,790,507,068,150,078/128,578,342.58
  6. Step 6: Final answer
    x = 99,476,372.24

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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.