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Finding the Fourth Proportional to 122,635.62, 183,884.04 and 42,636.78

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Solution

The fourth proportional to 122,635.62, 183,884.04 and 42,636.78 is: 63,931.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,635.62 : 183,884.04 = 42,636.78 : x
  2. Step 2: Convert to fraction form
    122,635.62/183,884.04 = 42,636.78/x
  3. Step 3: Cross multiply
    122,635.62x = 183,884.04 × 42,636.78
  4. Step 4: Simplify right side
    122,635.62x = 7,840,223,358.99
  5. Step 5: Solve for x
    x = 7,840,223,358.99/122,635.62
  6. Step 6: Final answer
    x = 63,931.05

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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.