Home / 258,462,428.12-387,697,015.89-85,939,241.57

Finding the Fourth Proportional to 258,462,428.12, 387,697,015.89 and 85,939,241.57

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Solution

The fourth proportional to 258,462,428.12, 387,697,015.89 and 85,939,241.57 is: 128,909,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,462,428.12 : 387,697,015.89 = 85,939,241.57 : x
  2. Step 2: Convert to fraction form
    258,462,428.12/387,697,015.89 = 85,939,241.57/x
  3. Step 3: Cross multiply
    258,462,428.12x = 387,697,015.89 × 85,939,241.57
  4. Step 4: Simplify right side
    258,462,428.12x = 33,318,387,502,600,352
  5. Step 5: Solve for x
    x = 33,318,387,502,600,352/258,462,428.12
  6. Step 6: Final answer
    x = 128,909,984.11

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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.