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Finding the Fourth Proportional to 102,890.80, 154,336.20 and 91,737.10

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Solution

The fourth proportional to 102,890.80, 154,336.20 and 91,737.10 is: 137,605.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,890.80 : 154,336.20 = 91,737.10 : x
  2. Step 2: Convert to fraction form
    102,890.80/154,336.20 = 91,737.10/x
  3. Step 3: Cross multiply
    102,890.80x = 154,336.20 × 91,737.10
  4. Step 4: Simplify right side
    102,890.80x = 14,158,355,413.02
  5. Step 5: Solve for x
    x = 14,158,355,413.02/102,890.80
  6. Step 6: Final answer
    x = 137,605.65

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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.