Home / 120,916.98-166,966.17-100,878.93

Finding the Fourth Proportional to 120,916.98, 166,966.17 and 100,878.93

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Solution

The fourth proportional to 120,916.98, 166,966.17 and 100,878.93 is: 139,296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,916.98 : 166,966.17 = 100,878.93 : x
  2. Step 2: Convert to fraction form
    120,916.98/166,966.17 = 100,878.93/x
  3. Step 3: Cross multiply
    120,916.98x = 166,966.17 × 100,878.93
  4. Step 4: Simplify right side
    120,916.98x = 16,843,368,575.80
  5. Step 5: Solve for x
    x = 16,843,368,575.80/120,916.98
  6. Step 6: Final answer
    x = 139,296.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.