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Finding the Fourth Proportional to 153,172.08, 211,375.44 and 86,104.08

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Solution

The fourth proportional to 153,172.08, 211,375.44 and 86,104.08 is: 118,822.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,172.08 : 211,375.44 = 86,104.08 : x
  2. Step 2: Convert to fraction form
    153,172.08/211,375.44 = 86,104.08/x
  3. Step 3: Cross multiply
    153,172.08x = 211,375.44 × 86,104.08
  4. Step 4: Simplify right side
    153,172.08x = 18,200,287,795.80
  5. Step 5: Solve for x
    x = 18,200,287,795.80/153,172.08
  6. Step 6: Final answer
    x = 118,822.49

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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.