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Finding the Fourth Proportional to 153,677.50, 212,076.60 and 86,609.50

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Solution

The fourth proportional to 153,677.50, 212,076.60 and 86,609.50 is: 119,522.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,677.50 : 212,076.60 = 86,609.50 : x
  2. Step 2: Convert to fraction form
    153,677.50/212,076.60 = 86,609.50/x
  3. Step 3: Cross multiply
    153,677.50x = 212,076.60 × 86,609.50
  4. Step 4: Simplify right side
    153,677.50x = 18,367,848,287.70
  5. Step 5: Solve for x
    x = 18,367,848,287.70/153,677.50
  6. Step 6: Final answer
    x = 119,522.04

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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.