Home / 107,916.10-161,874.15-85,608.70

Finding the Fourth Proportional to 107,916.10, 161,874.15 and 85,608.70

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Solution

The fourth proportional to 107,916.10, 161,874.15 and 85,608.70 is: 128,413.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,916.10 : 161,874.15 = 85,608.70 : x
  2. Step 2: Convert to fraction form
    107,916.10/161,874.15 = 85,608.70/x
  3. Step 3: Cross multiply
    107,916.10x = 161,874.15 × 85,608.70
  4. Step 4: Simplify right side
    107,916.10x = 13,857,835,545.11
  5. Step 5: Solve for x
    x = 13,857,835,545.11/107,916.10
  6. Step 6: Final answer
    x = 128,413.05

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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.