Home / 128,743,311.90-177,644,231.66-75,830,554.81

Finding the Fourth Proportional to 128,743,311.90, 177,644,231.66 and 75,830,554.81

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Solution

The fourth proportional to 128,743,311.90, 177,644,231.66 and 75,830,554.81 is: 104,633,479.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,743,311.90 : 177,644,231.66 = 75,830,554.81 : x
  2. Step 2: Convert to fraction form
    128,743,311.90/177,644,231.66 = 75,830,554.81/x
  3. Step 3: Cross multiply
    128,743,311.90x = 177,644,231.66 × 75,830,554.81
  4. Step 4: Simplify right side
    128,743,311.90x = 13,470,860,644,685,748
  5. Step 5: Solve for x
    x = 13,470,860,644,685,748/128,743,311.90
  6. Step 6: Final answer
    x = 104,633,479.18

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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.