Home / 258,462,428.49-387,697,016.45-85,939,241.94

Finding the Fourth Proportional to 258,462,428.49, 387,697,016.45 and 85,939,241.94

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Solution

The fourth proportional to 258,462,428.49, 387,697,016.45 and 85,939,241.94 is: 128,909,984.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,462,428.49 : 387,697,016.45 = 85,939,241.94 : x
  2. Step 2: Convert to fraction form
    258,462,428.49/387,697,016.45 = 85,939,241.94/x
  3. Step 3: Cross multiply
    258,462,428.49x = 387,697,016.45 × 85,939,241.94
  4. Step 4: Simplify right side
    258,462,428.49x = 33,318,387,696,327,556
  5. Step 5: Solve for x
    x = 33,318,387,696,327,556/258,462,428.49
  6. Step 6: Final answer
    x = 128,909,984.68

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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.