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Finding the Fourth Proportional to 122,540.40, 183,810.60 and 91,436.40

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Solution

The fourth proportional to 122,540.40, 183,810.60 and 91,436.40 is: 137,154.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,540.40 : 183,810.60 = 91,436.40 : x
  2. Step 2: Convert to fraction form
    122,540.40/183,810.60 = 91,436.40/x
  3. Step 3: Cross multiply
    122,540.40x = 183,810.60 × 91,436.40
  4. Step 4: Simplify right side
    122,540.40x = 16,806,979,545.84
  5. Step 5: Solve for x
    x = 16,806,979,545.84/122,540.40
  6. Step 6: Final answer
    x = 137,154.60

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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.