Home / 128,288,808.60-177,064,275.42-76,106,808.60

Finding the Fourth Proportional to 128,288,808.60, 177,064,275.42 and 76,106,808.60

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Solution

The fourth proportional to 128,288,808.60, 177,064,275.42 and 76,106,808.60 is: 105,042,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288,808.60 : 177,064,275.42 = 76,106,808.60 : x
  2. Step 2: Convert to fraction form
    128,288,808.60/177,064,275.42 = 76,106,808.60/x
  3. Step 3: Cross multiply
    128,288,808.60x = 177,064,275.42 × 76,106,808.60
  4. Step 4: Simplify right side
    128,288,808.60x = 13,475,796,919,287,622
  5. Step 5: Solve for x
    x = 13,475,796,919,287,622/128,288,808.60
  6. Step 6: Final answer
    x = 105,042,653.89

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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.