Home / 128,995,072.56-178,030,772.17-76,086,725.69

Finding the Fourth Proportional to 128,995,072.56, 178,030,772.17 and 76,086,725.69

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Solution

The fourth proportional to 128,995,072.56, 178,030,772.17 and 76,086,725.69 is: 105,010,046.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,995,072.56 : 178,030,772.17 = 76,086,725.69 : x
  2. Step 2: Convert to fraction form
    128,995,072.56/178,030,772.17 = 76,086,725.69/x
  3. Step 3: Cross multiply
    128,995,072.56x = 178,030,772.17 × 76,086,725.69
  4. Step 4: Simplify right side
    128,995,072.56x = 13,545,778,526,732,534
  5. Step 5: Solve for x
    x = 13,545,778,526,732,534/128,995,072.56
  6. Step 6: Final answer
    x = 105,010,046.18

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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.