Home / 285,644,009.89-428,601,418.08-138,008,811.93

Finding the Fourth Proportional to 285,644,009.89, 428,601,418.08 and 138,008,811.93

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Solution

The fourth proportional to 285,644,009.89, 428,601,418.08 and 138,008,811.93 is: 207,078,637.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,644,009.89 : 428,601,418.08 = 138,008,811.93 : x
  2. Step 2: Convert to fraction form
    285,644,009.89/428,601,418.08 = 138,008,811.93/x
  3. Step 3: Cross multiply
    285,644,009.89x = 428,601,418.08 × 138,008,811.93
  4. Step 4: Simplify right side
    285,644,009.89x = 59,150,772,500,734,024
  5. Step 5: Solve for x
    x = 59,150,772,500,734,024/285,644,009.89
  6. Step 6: Final answer
    x = 207,078,637.93

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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.