Home / 128,728,899.70-177,644,632.71-69,991,564.29

Finding the Fourth Proportional to 128,728,899.70, 177,644,632.71 and 69,991,564.29

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Solution

The fourth proportional to 128,728,899.70, 177,644,632.71 and 69,991,564.29 is: 96,587,679.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,728,899.70 : 177,644,632.71 = 69,991,564.29 : x
  2. Step 2: Convert to fraction form
    128,728,899.70/177,644,632.71 = 69,991,564.29/x
  3. Step 3: Cross multiply
    128,728,899.70x = 177,644,632.71 × 69,991,564.29
  4. Step 4: Simplify right side
    128,728,899.70x = 12,433,625,730,691,702
  5. Step 5: Solve for x
    x = 12,433,625,730,691,702/128,728,899.70
  6. Step 6: Final answer
    x = 96,587,679.69

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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.