Home / 128,569,992.51-177,423,571.98-75,650,127.78

Finding the Fourth Proportional to 128,569,992.51, 177,423,571.98 and 75,650,127.78

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Solution

The fourth proportional to 128,569,992.51, 177,423,571.98 and 75,650,127.78 is: 104,395,400.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569,992.51 : 177,423,571.98 = 75,650,127.78 : x
  2. Step 2: Convert to fraction form
    128,569,992.51/177,423,571.98 = 75,650,127.78/x
  3. Step 3: Cross multiply
    128,569,992.51x = 177,423,571.98 × 75,650,127.78
  4. Step 4: Simplify right side
    128,569,992.51x = 13,422,115,891,471,028
  5. Step 5: Solve for x
    x = 13,422,115,891,471,028/128,569,992.51
  6. Step 6: Final answer
    x = 104,395,400.74

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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.