Home / 138,687,218.40-208,064,005.20-66,824,536.80

Finding the Fourth Proportional to 138,687,218.40, 208,064,005.20 and 66,824,536.80

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Solution

The fourth proportional to 138,687,218.40, 208,064,005.20 and 66,824,536.80 is: 100,252,791.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,687,218.40 : 208,064,005.20 = 66,824,536.80 : x
  2. Step 2: Convert to fraction form
    138,687,218.40/208,064,005.20 = 66,824,536.80/x
  3. Step 3: Cross multiply
    138,687,218.40x = 208,064,005.20 × 66,824,536.80
  4. Step 4: Simplify right side
    138,687,218.40x = 13,903,780,772,242,790
  5. Step 5: Solve for x
    x = 13,903,780,772,242,790/138,687,218.40
  6. Step 6: Final answer
    x = 100,252,791.37

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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.