Home / 138,156,387.17-190,672,534.40-78,632,156.43

Finding the Fourth Proportional to 138,156,387.17, 190,672,534.40 and 78,632,156.43

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Solution

The fourth proportional to 138,156,387.17, 190,672,534.40 and 78,632,156.43 is: 108,521,892.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,156,387.17 : 190,672,534.40 = 78,632,156.43 : x
  2. Step 2: Convert to fraction form
    138,156,387.17/190,672,534.40 = 78,632,156.43/x
  3. Step 3: Cross multiply
    138,156,387.17x = 190,672,534.40 × 78,632,156.43
  4. Step 4: Simplify right side
    138,156,387.17x = 14,992,992,551,452,198
  5. Step 5: Solve for x
    x = 14,992,992,551,452,198/138,156,387.17
  6. Step 6: Final answer
    x = 108,521,892.18

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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.