Home / 106,669.38-159,656.85-78,578.40

Finding the Fourth Proportional to 106,669.38, 159,656.85 and 78,578.40

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Solution

The fourth proportional to 106,669.38, 159,656.85 and 78,578.40 is: 117,611.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,669.38 : 159,656.85 = 78,578.40 : x
  2. Step 2: Convert to fraction form
    106,669.38/159,656.85 = 78,578.40/x
  3. Step 3: Cross multiply
    106,669.38x = 159,656.85 × 78,578.40
  4. Step 4: Simplify right side
    106,669.38x = 12,545,579,822.04
  5. Step 5: Solve for x
    x = 12,545,579,822.04/106,669.38
  6. Step 6: Final answer
    x = 117,611.82

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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.