Home / 85,929,726.78-128,891,094.57-21,231,902.61

Finding the Fourth Proportional to 85,929,726.78, 128,891,094.57 and 21,231,902.61

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Solution

The fourth proportional to 85,929,726.78, 128,891,094.57 and 21,231,902.61 is: 31,846,990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,929,726.78 : 128,891,094.57 = 21,231,902.61 : x
  2. Step 2: Convert to fraction form
    85,929,726.78/128,891,094.57 = 21,231,902.61/x
  3. Step 3: Cross multiply
    85,929,726.78x = 128,891,094.57 × 21,231,902.61
  4. Step 4: Simplify right side
    85,929,726.78x = 2,736,603,167,206,539.50
  5. Step 5: Solve for x
    x = 2,736,603,167,206,539.50/85,929,726.78
  6. Step 6: Final answer
    x = 31,846,990.21

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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.