Home / 258,463,028-387,697,918.08-85,939,841.72

Finding the Fourth Proportional to 258,463,028, 387,697,918.08 and 85,939,841.72

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Solution

The fourth proportional to 258,463,028, 387,697,918.08 and 85,939,841.72 is: 128,910,885.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,463,028 : 387,697,918.08 = 85,939,841.72 : x
  2. Step 2: Convert to fraction form
    258,463,028/387,697,918.08 = 85,939,841.72/x
  3. Step 3: Cross multiply
    258,463,028x = 387,697,918.08 × 85,939,841.72
  4. Step 4: Simplify right side
    258,463,028x = 33,318,697,714,968,724
  5. Step 5: Solve for x
    x = 33,318,697,714,968,724/258,463,028
  6. Step 6: Final answer
    x = 128,910,885.14

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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.