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Finding the Fourth Proportional to 122,565.80, 183,717.90 and 69,861.80

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Solution

The fourth proportional to 122,565.80, 183,717.90 and 69,861.80 is: 104,718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,565.80 : 183,717.90 = 69,861.80 : x
  2. Step 2: Convert to fraction form
    122,565.80/183,717.90 = 69,861.80/x
  3. Step 3: Cross multiply
    122,565.80x = 183,717.90 × 69,861.80
  4. Step 4: Simplify right side
    122,565.80x = 12,834,863,186.22
  5. Step 5: Solve for x
    x = 12,834,863,186.22/122,565.80
  6. Step 6: Final answer
    x = 104,718.14

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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.