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Finding the Fourth Proportional to 122,561.30, 183,711.15 and 69,857.30

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Solution

The fourth proportional to 122,561.30, 183,711.15 and 69,857.30 is: 104,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,561.30 : 183,711.15 = 69,857.30 : x
  2. Step 2: Convert to fraction form
    122,561.30/183,711.15 = 69,857.30/x
  3. Step 3: Cross multiply
    122,561.30x = 183,711.15 × 69,857.30
  4. Step 4: Simplify right side
    122,561.30x = 12,833,564,918.90
  5. Step 5: Solve for x
    x = 12,833,564,918.90/122,561.30
  6. Step 6: Final answer
    x = 104,711.40

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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.