Home / 128,420,074.89-177,219,171.41-76,252,054.86

Finding the Fourth Proportional to 128,420,074.89, 177,219,171.41 and 76,252,054.86

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Solution

The fourth proportional to 128,420,074.89, 177,219,171.41 and 76,252,054.86 is: 105,227,519.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,420,074.89 : 177,219,171.41 = 76,252,054.86 : x
  2. Step 2: Convert to fraction form
    128,420,074.89/177,219,171.41 = 76,252,054.86/x
  3. Step 3: Cross multiply
    128,420,074.89x = 177,219,171.41 × 76,252,054.86
  4. Step 4: Simplify right side
    128,420,074.89x = 13,513,325,980,217,804
  5. Step 5: Solve for x
    x = 13,513,325,980,217,804/128,420,074.89
  6. Step 6: Final answer
    x = 105,227,519.85

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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.