Home / 215,108.47-322,371.98-81,916.07

Finding the Fourth Proportional to 215,108.47, 322,371.98 and 81,916.07

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Solution

The fourth proportional to 215,108.47, 322,371.98 and 81,916.07 is: 122,763.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,108.47 : 322,371.98 = 81,916.07 : x
  2. Step 2: Convert to fraction form
    215,108.47/322,371.98 = 81,916.07/x
  3. Step 3: Cross multiply
    215,108.47x = 322,371.98 × 81,916.07
  4. Step 4: Simplify right side
    215,108.47x = 26,407,446,070.73
  5. Step 5: Solve for x
    x = 26,407,446,070.73/215,108.47
  6. Step 6: Final answer
    x = 122,763.39

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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.