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Finding the Fourth Proportional to 153,104.66, 211,291.43 and 85,128.59

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Solution

The fourth proportional to 153,104.66, 211,291.43 and 85,128.59 is: 117,481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,104.66 : 211,291.43 = 85,128.59 : x
  2. Step 2: Convert to fraction form
    153,104.66/211,291.43 = 85,128.59/x
  3. Step 3: Cross multiply
    153,104.66x = 211,291.43 × 85,128.59
  4. Step 4: Simplify right side
    153,104.66x = 17,986,942,256.03
  5. Step 5: Solve for x
    x = 17,986,942,256.03/153,104.66
  6. Step 6: Final answer
    x = 117,481.35

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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.