Home / 258,078,016.80-387,117,025.20-212,728,384.80

Finding the Fourth Proportional to 258,078,016.80, 387,117,025.20 and 212,728,384.80

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Solution

The fourth proportional to 258,078,016.80, 387,117,025.20 and 212,728,384.80 is: 319,092,577.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,078,016.80 : 387,117,025.20 = 212,728,384.80 : x
  2. Step 2: Convert to fraction form
    258,078,016.80/387,117,025.20 = 212,728,384.80/x
  3. Step 3: Cross multiply
    258,078,016.80x = 387,117,025.20 × 212,728,384.80
  4. Step 4: Simplify right side
    258,078,016.80x = 82,350,779,499,376,896
  5. Step 5: Solve for x
    x = 82,350,779,499,376,896/258,078,016.80
  6. Step 6: Final answer
    x = 319,092,577.20

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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.