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Finding the Fourth Proportional to 153,433.34, 211,729.97 and 85,449.08

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Solution

The fourth proportional to 153,433.34, 211,729.97 and 85,449.08 is: 117,915.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,433.34 : 211,729.97 = 85,449.08 : x
  2. Step 2: Convert to fraction form
    153,433.34/211,729.97 = 85,449.08/x
  3. Step 3: Cross multiply
    153,433.34x = 211,729.97 × 85,449.08
  4. Step 4: Simplify right side
    153,433.34x = 18,092,129,659.03
  5. Step 5: Solve for x
    x = 18,092,129,659.03/153,433.34
  6. Step 6: Final answer
    x = 117,915.25

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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.