Home / 131,916.47-198,139.44-78,712.25

Finding the Fourth Proportional to 131,916.47, 198,139.44 and 78,712.25

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Solution

The fourth proportional to 131,916.47, 198,139.44 and 78,712.25 is: 118,226.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,916.47 : 198,139.44 = 78,712.25 : x
  2. Step 2: Convert to fraction form
    131,916.47/198,139.44 = 78,712.25/x
  3. Step 3: Cross multiply
    131,916.47x = 198,139.44 × 78,712.25
  4. Step 4: Simplify right side
    131,916.47x = 15,596,000,145.44
  5. Step 5: Solve for x
    x = 15,596,000,145.44/131,916.47
  6. Step 6: Final answer
    x = 118,226.33

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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.