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Finding the Fourth Proportional to 122,389.94, 183,409.86 and 69,690.62

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Solution

The fourth proportional to 122,389.94, 183,409.86 and 69,690.62 is: 104,436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,389.94 : 183,409.86 = 69,690.62 : x
  2. Step 2: Convert to fraction form
    122,389.94/183,409.86 = 69,690.62/x
  3. Step 3: Cross multiply
    122,389.94x = 183,409.86 × 69,690.62
  4. Step 4: Simplify right side
    122,389.94x = 12,781,946,857.51
  5. Step 5: Solve for x
    x = 12,781,946,857.51/122,389.94
  6. Step 6: Final answer
    x = 104,436.25

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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.