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Finding the Fourth Proportional to 153,318, 211,579.08 and 85,329.84

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Solution

The fourth proportional to 153,318, 211,579.08 and 85,329.84 is: 117,755.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,318 : 211,579.08 = 85,329.84 : x
  2. Step 2: Convert to fraction form
    153,318/211,579.08 = 85,329.84/x
  3. Step 3: Cross multiply
    153,318x = 211,579.08 × 85,329.84
  4. Step 4: Simplify right side
    153,318x = 18,054,009,043.75
  5. Step 5: Solve for x
    x = 18,054,009,043.75/153,318
  6. Step 6: Final answer
    x = 117,755.31

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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.