Home / 128,569,991.91-177,423,571.08-75,650,127.15

Finding the Fourth Proportional to 128,569,991.91, 177,423,571.08 and 75,650,127.15

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Solution

The fourth proportional to 128,569,991.91, 177,423,571.08 and 75,650,127.15 is: 104,395,399.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569,991.91 : 177,423,571.08 = 75,650,127.15 : x
  2. Step 2: Convert to fraction form
    128,569,991.91/177,423,571.08 = 75,650,127.15/x
  3. Step 3: Cross multiply
    128,569,991.91x = 177,423,571.08 × 75,650,127.15
  4. Step 4: Simplify right side
    128,569,991.91x = 13,422,115,711,609,064
  5. Step 5: Solve for x
    x = 13,422,115,711,609,064/128,569,991.91
  6. Step 6: Final answer
    x = 104,395,399.83

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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.