Home / 128,612,172.20-193,142,207.10-68,145,996.20

Finding the Fourth Proportional to 128,612,172.20, 193,142,207.10 and 68,145,996.20

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Solution

The fourth proportional to 128,612,172.20, 193,142,207.10 and 68,145,996.20 is: 102,337,655.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,612,172.20 : 193,142,207.10 = 68,145,996.20 : x
  2. Step 2: Convert to fraction form
    128,612,172.20/193,142,207.10 = 68,145,996.20/x
  3. Step 3: Cross multiply
    128,612,172.20x = 193,142,207.10 × 68,145,996.20
  4. Step 4: Simplify right side
    128,612,172.20x = 13,161,868,111,096,214
  5. Step 5: Solve for x
    x = 13,161,868,111,096,214/128,612,172.20
  6. Step 6: Final answer
    x = 102,337,655.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.