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Finding the Fourth Proportional to 153,355.60, 211,636.80 and 85,375.60

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Solution

The fourth proportional to 153,355.60, 211,636.80 and 85,375.60 is: 117,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,355.60 : 211,636.80 = 85,375.60 : x
  2. Step 2: Convert to fraction form
    153,355.60/211,636.80 = 85,375.60/x
  3. Step 3: Cross multiply
    153,355.60x = 211,636.80 × 85,375.60
  4. Step 4: Simplify right side
    153,355.60x = 18,068,618,782.08
  5. Step 5: Solve for x
    x = 18,068,618,782.08/153,355.60
  6. Step 6: Final answer
    x = 117,821.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.