Home / 429,325,028.39-644,090,287.80-138,219,363.29

Finding the Fourth Proportional to 429,325,028.39, 644,090,287.80 and 138,219,363.29

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Solution

The fourth proportional to 429,325,028.39, 644,090,287.80 and 138,219,363.29 is: 207,362,123.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,325,028.39 : 644,090,287.80 = 138,219,363.29 : x
  2. Step 2: Convert to fraction form
    429,325,028.39/644,090,287.80 = 138,219,363.29/x
  3. Step 3: Cross multiply
    429,325,028.39x = 644,090,287.80 × 138,219,363.29
  4. Step 4: Simplify right side
    429,325,028.39x = 89,025,749,480,988,848
  5. Step 5: Solve for x
    x = 89,025,749,480,988,848/429,325,028.39
  6. Step 6: Final answer
    x = 207,362,123.32

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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.