Home / 128,555,523.69-177,417,563.91-72,810,860.63

Finding the Fourth Proportional to 128,555,523.69, 177,417,563.91 and 72,810,860.63

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Solution

The fourth proportional to 128,555,523.69, 177,417,563.91 and 72,810,860.63 is: 100,485,184.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,523.69 : 177,417,563.91 = 72,810,860.63 : x
  2. Step 2: Convert to fraction form
    128,555,523.69/177,417,563.91 = 72,810,860.63/x
  3. Step 3: Cross multiply
    128,555,523.69x = 177,417,563.91 × 72,810,860.63
  4. Step 4: Simplify right side
    128,555,523.69x = 12,917,925,518,278,040
  5. Step 5: Solve for x
    x = 12,917,925,518,278,040/128,555,523.69
  6. Step 6: Final answer
    x = 100,485,184.51

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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.