Home / 138,898,418.20-208,288,644.90-67,116,837.40

Finding the Fourth Proportional to 138,898,418.20, 208,288,644.90 and 67,116,837.40

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Solution

The fourth proportional to 138,898,418.20, 208,288,644.90 and 67,116,837.40 is: 100,646,755.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,898,418.20 : 208,288,644.90 = 67,116,837.40 : x
  2. Step 2: Convert to fraction form
    138,898,418.20/208,288,644.90 = 67,116,837.40/x
  3. Step 3: Cross multiply
    138,898,418.20x = 208,288,644.90 × 67,116,837.40
  4. Step 4: Simplify right side
    138,898,418.20x = 13,979,675,112,019,640
  5. Step 5: Solve for x
    x = 13,979,675,112,019,640/138,898,418.20
  6. Step 6: Final answer
    x = 100,646,755.33

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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.