Home / 128,288,799.10-177,064,262.31-76,106,799.10

Finding the Fourth Proportional to 128,288,799.10, 177,064,262.31 and 76,106,799.10

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Solution

The fourth proportional to 128,288,799.10, 177,064,262.31 and 76,106,799.10 is: 105,042,640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288,799.10 : 177,064,262.31 = 76,106,799.10 : x
  2. Step 2: Convert to fraction form
    128,288,799.10/177,064,262.31 = 76,106,799.10/x
  3. Step 3: Cross multiply
    128,288,799.10x = 177,064,262.31 × 76,106,799.10
  4. Step 4: Simplify right side
    128,288,799.10x = 13,475,794,239,416,872
  5. Step 5: Solve for x
    x = 13,475,794,239,416,872/128,288,799.10
  6. Step 6: Final answer
    x = 105,042,640.78

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1.5x scale

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.